Miss coloration on my tv :(

I got this 21" tv from thomson last year. Its a a thomson 21DC320. I dont know what the correct english word for it is, but litterely translated its a “picture tube” tv, With extra flat picture tubes. Not bent ones like you see in those old TV’s.

Anyways, I got two misscolored circles. Like someone was holding a magnet in front of the TV. One green to the left and a blue to the right. They’re not all that visible but they’re visible enough to get annoying. I cant exactly deguss the TV like I can with my computer monitor so I dont know what to do :/.

Anyone know how to fix this? or should I just take it back to the store? I mean its only 1 year old, this sort of thing shouldnt happen after just 1 year.