"Unpaid loan"

I have a situation that happened on November 2021. Money was debited from my FNB account, but i was constantly getting messages from Capitec that I have not paid. I have never missed a payment before. I then immediately went to the my branch and printed a statement to proof that the money was debited. I then proceeded to Capitec to show them proof that the money was paid. I was informed that Capitec is having a problem accepting debits from other banks. I was assured that the problem will be fixed and that it won't affect my credit score. Here we are again in January 2022 and money went through but I'm receiving messages again of non-payment yet again. Could you please fix this problem because it's utterly unprofessional, now that my credit score has been affected and went down by 11 points because of your mistake. I'm extremely disappointed in your service.