Sad and horrible experience after many years of visits

Absolutely horrible. My dog went in for a swollen anal gland, quote was given and I accepted and paid the 50% deposit ( even though it was double compared to 2 other vets ) but all 4 my dogs and 2 cats have only gone to Onderstepoort numerous times so I was prepared to pay more because of the relationship I had with them. When my wife had to collect our dog, i had a issue with the transfer I made to her for the outstanding 50% on the account, and I asked them telephonically if we could just take our dog home and I would come by the next day to settle the account and they refused and said the dog will stay there untill the account is paid. After a massive struggle I managed to transfer to my wife, when she arrived to collect the dog suddenly the balance was much more than quoted earlier that day, because of apparent medication and tests for cancer that got added on. I had only managed to transfer the amount to my wife that was outstanding, and yet still they refused to release my dog if she could not pay the higher amount. And refused again for me to pay the added amount the next day. This place will never again treat one of my animals, my account history with them is above the 50k mark and yet this is the attitude over a couple hundred rand and refusing to release a dog to sleep in its own bed over a quote they exceeded without prior arrangement. Never ever again.