My mum brought her cat who is not eating well in J...

My mum brought her cat who is not eating well in Jun and was told to leave the consultation room. When my mum is finally asked to go in they said they need to extract the cat's tooth. A month after the extraction, the cat is still not eating, her tongue stuck out and not able to retract back. Bought to a different vet clinic and the doc said it might be due to rough handling during the tooth extraction, causing jaw dislocation. In fact this cat had a tumour in her mouth and not sure why this clinic extracted her tooth instead. 3 months after the visit to this clinic, she has passed on today. No accountability from this clinic and i don't understand why they don't allow pet owner in the consultation room. Fees are so expensive too!