TERRIFIED CUSTOMER WITH MTN

MTN has become highly bad. My account was paid in June including July and August. For no apparent reasons, here they are softlocking my number saying I'm owing. Can they just please do their job properly and focus on each and every account they are working. It's been two weeks now as I have sent the emails but nothing happend. My life is stucked now regarding this mess. They must just fix it ASAP.