The long, tortured history of Orson Welles’ final film — shot in the 1970s but left uncompleted upon his death in 1985 — has taken some new and bizarre twists.

Nearly a year after $406,605 was raised to finish “The Other Side of the Wind’’ through a crowdfunding campaign, there’s been nothing but radio silence from the campaign’s organizers. Some furious donors are starting to cry foul and have asked for their money back.

Despite assurances that the film’s negatives “were being flown over from Paris,’’ there are unconfirmed reports they’re still being held by Welles’ last companion — and that Netflix has joined the quixotic quest, unsuccessfully negotiating with her over the past six months.

Even filmmaker Peter Bogdanovich, who was in the cast of “The Other Side of the Wind’’ and the public face of the crowdfunding campaign on Indiegogo, seems exasperated.

“I am supposed to supervise the editing of the film,’’ he said in an interview with France’s Le Monde, posted last week to YouTube. “I keep being told . . . ‘10 days, maybe two weeks, we should have it all wrapped up.’ I have been hearing that for a long time, but it is possible that one day I will be surprised and they will really have everything wrapped up and we can go to work.’’

Shot between 1970 and 1976, the film follows the last night in the life of a once-famous director (Welles’ friend John Huston) who is trying to restart his career with an edgy film called “The Other Side of the Wind.’’ The cast also includes Dennis Hopper and Croatian actress Oja Kodar.

Kodar, who lived with Welles in his final years, holds part ownership of the film and apparently physical custody of the negatives. Previous efforts to complete the film — including one backed by Showtime a decade ago — supposedly foundered in part because of bad blood between Kodar and Beatrice Welles, the filmmaker’s daughter by his third wife and his other main heir.

Another group of would-be restorers — including “Jurassic World’’ producer Frank Marshall, who worked on Welles’ film — announced in October 2014 they had reached an agreement with Kodar and that the film would be completed in time for a showing on the 100th anniversary of Welles’ birth on May 6, 2015.

Instead, a $2 million crowdfunding campaign was launched last May 7 on Indiegogo. After a disappointing start, the goal was cut to $1 million and the campaign was extended, eventually raising only $406,605 from 2,859 backers before it closed on July 6.

A year later, donors lured by tickets to the film’s premiere — and perks like “commemorative terrycloth robes . . . just like Orson used to wear on the set’’ — have started getting restless at the seeming lack of progress in restoring the film, which the organizers said on the Indiegogo website “we hope to complete . . . in Orson’s centennial year.’’

“This is akin to organized fraud,’’ one irate donor identified as Jérôme Stavroguine wrote two months ago on the comments section of the campaign’s Indiegogo page. “More than 400,000 USD disappeared with the promises of finishing a masterpiece. What can we do in order to get a refund and report this fraud to Indiegogo and to the FBI?’’

An Indiegogo spokesman said the crowfunding platform, which serves only as a go-between, had received “only’’ five requests for refunds and referred them to the campaign’s organizers, who were given their $406,605 shortly after the campaign closed last summer.

The spokesman said it was “our understanding the refunds are being paid to people who ask and that the organizers are confident they will finish the film.’’

But according to the fan site Wellesnet, the producers’ $1.3 million deal with Kodar is being renegotiated because the producers received a $5 million offer from Netflix for worldwide rights to “The Other Side of the Wind’’ and a new documentary on the film’s completion.

Netflix declined to comment on its reported participation in the talks, which Wellesnet says began in “late summer,’’ after the Indiegogo campaign closed.

The only one of “multiple sources’’ cited by Wellesnet is identified as Kodar’s nephew Sasha Welles, who’s reportedly negotiating on her behalf — and who blamed the lead producer on the project, Filip Jan Rymsza.

“For decades we have been optimistic, otherwise we wouldn’t be trying for so long to get this film released. How optimistic should we be about this particular deal? Hard to tell,’’ Wellesnet quoted Sasha Welles as saying.

“We have been dealing with Filip’s not-so-honest claims and promises; Frank [Marshall] brings the only legitimacy and fairness to their side. All in all, I am not so optimistic since they keep on chiseling away from our old agreement. Every time I give in to something they want, they come up with something else, this keeps going on and on and I don’t know where the end is.”

Bottom line: I wouldn’t expect to see “The Other Side of the Wind’’ — which may or may not be the masterpiece some hope it will be — anytime soon. Small wonder that another donor commenting on Indiegogo wondered whether the crowdfunding campaign “wasn’t a trick like the ones from’’ another late Welles film, “F for Fake.’’