MTN cant seem to re allocate their payments

So I have paid my MTN contract on the 26th of Jan 2025. MTN allocated the funds to the wrong account. In mid Feb we noticed it when they put off our phones. Since then im in comunication with them about this. Logged calls etc but they just cant seem to allocate the money correctly. With the result that my account looks like it is in arrears. They keep switching our phones off. This is an headhache and frustration. I really dont know what to do anymore