Inaccessible customer service from Wesbank!

Communication and customer service is appalling at this financial institution. They will provide vehicle finance loans easily at the beginning but once you sign with them and need customer support, they are unavailable. I requested for a debit order change on 15 December 2022, and received a request confirmation and reference number. It is currently more than a month later and I am receiving notices about my account being in arears. I did everything pre-emptively to ensure my account would be paid on time but it seems that my request was not processes. I have been trying to contact Wesbank, I get to the automated responses and then the call cuts. Extremely frustrating experience. Where are the real people employed by this institution?