Failure in allocating payments

Failure to locate and allocate payment.

I have been told that they moved from old to new system hence they can't rectify the issue. I sent MTN banking statement reflecting two payments made on their account in March, we are now in June but they have not allocated my payment ls accordingly and my credit score shows a missing payment.

I have been making weekly calls, sending emails and am always told that it will b rectified in 48hrs but till today it hasn't been done.

I am very much disappointed with MTN