Need legal help. Or renters rights help?

It sounds like your only recourse would be to file an action in court and the amount would determine if it was worthwhile pursuing, the stained carpet is not normal wear and tear and most rental/lease agreements specify that pet deposits are non-refundable. If you signed it it is a legal contract whether state landlord/tenant laws specify it or not. Again depending on the amount if you can get any of it back you should accept it and move on but if you think or an attorney thinks you can prevail in court then a suit may be your only answer.}{