Help us pay for our baby

Andy had urinary crystals that blocked off his urethra so he couldnt pass them or urine and his body tried to shut down. After a week in the animal hospital he was cleared. The only problem is we paid them $600 cash, all of our savings for my baby. I didnt want to lose him so I paid every time they told me to.  The vet staff there ignored Andy while he was in pain and in need of assistance, and now our last bill is $500 more theyre charging and they refuse to give him his medicine until I pay. I asked to make payments and they refused :/. If I cant reach my goal, thats okay. But I'm desprite for help. All I want is my baby's medicine he needs.