My Left eye screen glitches but right eye screen is fine

For some reason my left eye piece is glitching. I just bought it today and popped in mario tennis. but the left screen sometimes has random characters, flashing lines, and pixels. but the left speaker is fine. right eye piece works amazingly. the right is crystal clear. Please help! if there is no easy way to really fix this i can always take it back, thanks and Happy Collecting!