I HAVE JUST DISCOVERED MY 8 1/2 WEEK OLD LHASA APSO HAS AN OVER SET JAW?

I BOUGHT HIM WITH HIS FULL PEDIGREE PAPERS, SAW HIS MUM AND DAD AND HE COMES FROM GOOD BREEDING LINES. WHEN I TOOK HIM FOR HIS FIRST INJECTION, THE VET HAS INFORMED ME THAT HE HAS QUITE A SIGNIFICANT OVER SET JAW, MEANING I CANNOT BREED FROM HIM AND IT WILL COST QUITE A LOT OF MONEY TO FIX WHEN HE GETS OLDER AND MY INSURANCE WILL NOT COVER THIS BECAUSE IT IS A HEREDITARY CONDITION. I WOULD NOT TAKE MY PUPPY BACK BECAUSE I LOVE HIM TO BITS ALREADY BUT AM I ENTITLED TO ANY MONEY BACK FROM THE BREEDER DUE TO HIS CONDITION? AS THIS COULD GO TOWARDS HIS FUTURE VET BILLS? ANY ADVICE WOULD BE APPREICIATED. THANK YOU