Bad service and attitude by call centers

Bad service and attitude by call centre agent. I cancelled my account in September and asked for the settlement amount and I paid it. In November they debit my account . When I called to asked they say it’s an intiation fee Then I told the agent that I asked for a settlement amount and Paid so why was that not included in the settlement amount. She tells me to read my contract. I will never open an account again with rcs.