A top adviser to Donald Trump says the billionaire's presidential campaign fully intends to file a complaint with the Republican National Committee over its allocation of delegates.

"The problem we're having here is there was a secret meeting in Louisiana of the convention delegation and apparently, all of the invitations for our delegates must've gotten lost in the mail," senior campaign advisor Barry Bennett told MSNBC Monday afternoon.

Over the weekend, Trump accused rival Ted Cruz of trying to "steal" delegates from him in Louisiana after the Wall Street Journal reported that Cruz "may wind up with as many as 10 more delegates" in the state state despite finishing second behind Trump in Louisiana's Republican primary.

Both candidates were originally awarded 18 delegates each, while Florida Sen. Marco Rubio received five. Since Rubio exited the race, his delegates are now able support any candidate at the convention and are more likely to back Cruz or Kasich than Trump.

"I've been with our legal team most of the morning now and we are moving forward with a complaint to decertify these delegates," Bennett said Monday.

Bennett explained that the complaint will be filed "inside the party," contradicting Trump's original threat of a "lawsuit."

"It's not something you file with the court, it's something you file inside the party," he said, adding that "it's a decertification so that these delegates, these rules committee members and folks don't get seated [at the Republican National Convention]."

Despite saying the Trump campaign is "moving forward" with the claim, Bennett also suggested they're in no rush to submit it.

"I don't know how long it will take the attorneys to draft it up, but we've got plenty of time," he said. "We're going to protects our rights to the fullest extent possible."

Jason Dore, the Louisiana GOP's executive director, reportedly told the Times-Picayune on Sunday that the party will be prepared if such a claim is filed.

"[I'm] really confident in the rules," Dore said. "[We] are taking it seriously and will be prepared."