Just trying to unblock account

I had a huge account issue with MTN where i was in the wrong, they then blocked my account. II spoke to them and got a settlement statement for my outstanding bill and paid it in full on the morning of 15/06/18. i proceeded to go to Clearwater mall's branch to find out if they received my payment and that we are all square. i was told my account was blocked and that i should give it 1 day to reflect. The employee then proceeded to tell me he will escalate my problem when i gavev him a Proof Of Payment. It is now the afternoon of 18/06 and i was told that it still hasn't been done. I have phoned every single day about 3 times a day to speak to the same employee, who keeps getting my hopes up saying give it a few more hours to unlock. i am now tired of my account being blocked considering i have paid everything in full. also tired of employees telling me it will be done soon when it is a flat out lie to me.