Monthly payment

Good day We are a client of Wesbank since we bought our vechile Acc nr ***. Our last payment was on the 1st April 2021 R6217 my husband was retrenched from his previous employer. He contacted the call centre when he arrived back in SA in May to advise them he was retrenched and they agreed on payment of R3000 per month until he was back on his feet as he was looking out for a new job. Since then we proceeded and leaving enough funds in our account for them to debit on the 1st each month. My husband did find work and started in Sep outside of SA. Suddenly Wesbank arrived at my home demanding R24 000 to be paid or else. No one contacted us since May to ask what is going on and we were under the impression that they were taking their R3000 as it goes off with a debit order. Please we will catch up the outstanding amount, but I truly feel Wesbank did not do their part.