Customer service who seeks everything not to repay...

Customer service who seeks everything not to repay. I had to ask the veterinarian for a problem on my dog, sterilized, but which showed signs of heat. They finally paid me back after months of emails, threats, letters to headquarters. They refunded the sterilization, but never updated the record of my dog ...
Now, the person who answers me for customer service no longer signs his name. Vaccine never reimbursed on time, no understanding of customer service ... AVOID ABSOLUTELY