Poor performance and service delivery

On 30th December 2021 I phoned head office African bank asking to update my new banking details and request to change mandates in order for me to authorise new debicheck from my Nedbank Cheque Account but they failed to do so. My credit card and loans are due now because I can't pay them even if I check my African bank app still showing my previous account. I tried calling many times for your assistance and I only receive sms stating D/O has been updated.I am not happy with thier service. The next thing I will be placed as a bad debtor for not being consistent.