Speakers repair

I'm new here.
One of my front speakers is not doing well. It has a really blurry sound, like an AM radio. The other one's still perfectly clear.

I think my father bought these speakers for quite a lot of money, so i'd rather have someone repair them. I don't really want to buy a new pair.

Where can I find someone to fix it? How much would it cost?

Could you mind post a photo here.