A Florida teen needs to ask for a refund on his shark-repellent wristband.

Just days after getting the Shark Banz magnetic band for Christmas, Zack Davis went surfing off North Hutchinson Island near his home of Vero Beach, Fla., and was promptly attacked by, you guessed it, a shark.

“It was supposed to keep sharks away and the first time I wore it, and I go surfing a lot, but the first time I wore it, I get bit.” Davis told local TV station CBS 12.

The shark, believed to be a black tip, chomped down on Davis’s right arm, gashing him for 44 stitches in the shape of a shark jaw. He was able to shake free of the beast after “two or three seconds” and quickly got out of the blood-stained water before being attacked a second time.

“It was like shocking,” he said. “It wasn’t really painful. Honestly I wasn’t really in pain I was just like, ‘Oh my gosh, I need to do something with this quick,’ so I just took my leash from my board and just wrapped it around my arm because I didn’t want to lose any blood.”

Davis spent the night in hospital but has been discharged and is anxious to get back on his surfboard.

Now his mom, who gave him the Shark Banz as a gift, is looking to get her $80 back.