Mfc customer service not helping

My settled vehicle instalment / debit order was just taken from my account. I’ve tried to call and the calls are either kil led or the person has some issue with their mic (while wasting my airtime). I have emailed the settlement POP and so has the dealer. No one has called back despite being promised a call back. The chatbot or agent on Nedbank is unhelpful. Emails go unanswered. I am hopeless 😩