Wesbank vehicle finance settlement

Traded in my vehicle at the dealership with the option to settle the current vehicle in order to new finance (both at Wesbank). The settle amount was paid in full on the 15th of December 2022. After the vehicle was settled I tried to get hold of Wesbank just to confirm if everything is in place, with no luck i couldn't get hold of customers care I even sent them an email with no response. The 22nd of Decemeber they deducted the monthly installment on my old vehicle which I then tried calling them again a couple of times just so they can blame me for them not doing their work properly. They told me that its my fault I didn't call to confirm settlement of the vehicle. I asked the lady if she could se on their system that the settlement letter was requested and paid in full and her answer was yes but still its my fault not for calling to confirm. Needless to say the call was pointless as I had to call again on the 24th due to finace department not able to assist me. I asked the lady if Wesbank will be able to assist me on the 24th seeing that its Christmas and Saturday and she confirm they will assist me. Right... called the 24th again multiple times just to get hold of them and al they can that particular day is to log the claim because customer care is not available that day( after the lady confirmed they will assist) on the 28th I called again, this time they said they escalated my claim to their managers for immediate payment and that it will reflect on the 30th. On the 30th, I called again because i still haven't received my refund, and they don't have answers for me. Out of all the banks I could have chosen Wesbank had the highest intrest rate and yet as a loyal customer I wish to stick ith them. If I knew what i know now i would've taken my business elsewhere.