Tasso farms Cleveland tn - Sales unhealthy animals

I purchased a female red dachshund from Tasso farms. When I purchased her the breeder Mary burns said she would mail the papers as soon as she got them. I noticed my puppy not feeling well soon after we purchased her and we took her to the vet. The first vet said she would not make it so we took to another were they diagnosed her with parvovirus roundworms an bacterial infection! The vet said there was no way our puppy was given shots as Mary burns told us she had and gave us paperwork indicating this. Our puppy nearly passed away. Within 9 days of having her we had paid for the dog, 600 in vet bills from her staying overnight then weeks after for follow up treatment. Once we found out our puppy was sick we notifie Mary burns we stated in two weeks she would get her social security check and refund us the amount of the dog...it's now been 4 weeks no payment and we've made several calls. We advised yesterday we are seeking legal action and she said she would mail us a bad check that he didn't have the money in the bank but her bank would cash it. I'd love to hear from others and I wish I would have looked on here or known to before I purchased my dog. Just beware thanks!