Ringworm is highly contagious and can be transmitted between humans and their pets. Wrestlers are known to contract it from the wrestling mats if they are not sanitized properly after use.
My advice to you is to get the puppy's records from the previous vet and SUE this breeder for both your medical costs and the cost of treating the puppy too.
This the second time this week that I have heard of a puppy having ringworm coming from a breeder. If the puppies all had ringworm they HAD to have got it from the mother~so my question would be if this breeder did not want to treat the puppies what kind of vet care if this person providing to the mother? The thought make me just sick

Did you see the parents of the puppies? Where did you purchase this puppy from?