Since I, unfortunately, have some experience with this now, I would like to comment.
I have purchased three bulldogs, each with a one year health guarantee. Of course, the breeder is not God, they cannot guarantee the puppy will be healthy - no one can. But each bulldog I've purchased comes with a contract that says if the bulldog becomes ill with an incurable, terminal, or debilitating illness within a year, the breeder will be contacted and the breeder will take the puppy back and provide a replacement puppy. I have never seen a contract that says you will get your money back. And of course, you are never, ever going to run into a breeder that is going to pay for your vet bills if the puppy does get sick - no breeder can maintain the financial responsibility of all the puppies they breed.
In my case, I signed a contract that said if the puppy becomes ill, I can return him and get a new puppy. I can't think of any circumstance where someone would do that unless the breeder could offer some kind of care the buyer could not but I asked for my money back. Granted, it was only 10 days after the purchase - but I asked and received - with the signed condition that if it becomes a situation where the pup will not have any quality of life, I am responsible for humanely euthanizing him.
Unfortunately, no one can cover the emotional investment you make in a puppy and that is the thing that tends affects many of us more than the money or the time - after 10 days or 10 months or 10 years, there is little anyone can do to make things right when everything seems to be going wrong.
In your case Libra, I would guess with near certainty, that after 3 years, there isn't much they are going to do for you.
