They used his name and his famous six-pack to promote their protein-infused line of Devotion Vodka. But according to Mike Sorrentino, the beverage manufacturers are a faithless bunch who have short-changed him on their deal.

The Jersey Shore star has filed a lawsuit for $5million against Devotion Spirits, the makers of the liquor, TMZ reported on Sunday.

Mike Sorrentino, who is sober after seeking treatment for alcohol and prescription drug abuse earlier this year signed an endorsement deal with Devotion in 2010 but claims the company has not held up their end of the business arrangement.

The buff reality TV star states he is due a 2% stake in the company, a $400,000 buy back option for his shares and copies of the company’s sales reports.

Mike, 30, says that even though he performed his contractual obligations, Devotion kept looking for an excuse to cut him out and avoid paying him the money he’s owed.

TMZ claim the Jersey native is suing Devotion for his entire 10% share in the company, which he estimates to be worth as much as $5 million, and other damages.

Devotion vodka contains a clear protein called Casein which can support an increase in lean body mass and a decrease in body fat if the user is also on some sort of weight training program, according to their website.

Ashton Tyler | Elite.