The worst customer service experience

My contract got cancelled with WBC because there was a problem with the car, so cancelling the contract, meant payment back to Marquis finance. So WBC paid them on the 31st Jan 2024 fully and MF debited on my account on the first. When i email them to ask why they deducted, i only get a no-reply response. So now i opt to calling the customer care line and I would call multiple times throughout the day, to a point where i have to wait for about 10 -20 minutes, or more on the line .When i eventually get to speak to someone, the answer i keep on getting is that the account is handled by one of their colleagues and the next answer i get is that the money has not been allocated in their accounts.(this is the same answer i get every-time i call them…The call centre agents have the same speech to say that they will email me or call before end of business to update me but its been 3 weeks now and everytime i keep on calling, i get the same answer and they don't even email or call back to inform me regarding my situation and now it leads me to start all over again with calling the next day, to experience the same issue with waiting on the line and getting the same answer over and over again.