Poor service delivery. A supervisor/Manager should contact me urgently.

It has been back and forth sms's, emails and phone calls between me and MFC. They claim that my payments are behind, and I agree with them. They deny the payment I made on 30 May 2024 and another payment 03 June 2024. The call centre asked that I send a proof of payment and I did in the first week of June. Another caller called in the week of the 18th of June and asked that I send a proof of payment and I did. The third caller in week 3 of June asked for the same information, and another caller asked for the same information, I just sent it again 18h30 this evening. I have never come across such an incompetence in my life!!!! I checked my account online and it keeps on accumulating interest.

I am inviting someone above the level of a call centre agent to address me please I need a way forward. An issue/complaint cannot last more than a month to be resolved, NEVER!!