He’s no Guardian Angel — according to disgruntled staffers.

Guardian Angels founder Curtis Sliwa is facing accusations of stiffing workers on his failed New York City mayoral campaign out of thousands of dollars in back pay, The Post has learned.

Republican Party activists have been fielding gripes from the GOP nominee’s campaign staffers about being owed lots of moolah, insiders said.

“The biggest source of complaints is from the hourly paid canvassers. They need the money,” said one GOP source.

Emails reviewed by The Post also claim that calls have not been returned to staffers owed or promised money, including canvassers, who are meant to get paid $25 an hour.

One canvasser, who claimed he’s owed $2,000, said he hopes to get paid soon because he needs the money.

“I am owed a coup

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