The season-ticket holder/heckler whom owner James Dolan called “an a–hole” said he is being prevented from renewing his partial-plan tickets for next season.

The deadline for keeping the same seats is Tuesday. Mike Hamersky told The Post his attempts were rebuffed when a Knicks phone agent put him on hold twice, then he got disconnected. The third time, after saying his name, he was hung up on.

Hamersky, a 35-year-old attorney from Astoria, said he earlier tried to renew online but claimed he was frozen out of his account. He also said he had not had any emails returned to him, and a call to his individual ticket agent went to voicemail.

“If they’re revoking my tickets at least have the courtesy to tell me,’’ Hamersky told The Post.

The wild incident with Dolan occurred April 4 in front of the Garden when, while drinking a beer, Hamersky said he told the owner to “Sell the team, Jim.’’

Dolan got in his face and called him “an a–hole’’ and tried to bar him from the arena. Hamersky said he was followed by a security man and he dodged him, finally slipping into the Garden. Hamersky told The Post last week he feared he’d be barred from renewing his tickets and contacted the NBA.

NBA commissioner Adam Silver said he wasn’t going to get involved, saying he was “not concerned.’’ Dolan has owned up to his tirade, saying getting “disrespected’’ at his workplace is uncalled for.

The Knicks have declined comment.