Disgusting service from MTN

I am highly dissatisfied with the service I have been receiving. I currently have the contracts accounts with MTN of which are fully up to date with payments. Despite this, SIM cards have been locked, and I am unable to make any calls. This issue has been ongoing since 15 August 2025, and instead of receiving proper assistance, I have been sent from pillar to post without any resolution. This is unacceptable, especially considering that I am a paying and compliant customer. I demand the following immediate unlocking of all SIM cards. A clear explanation as to why my accounts were restricted despite being fully paid up. Assurance that this matter will not recur in the future. Should this matter not be resolved urgently, I will have no choice but to escalate it further. I need reimbur*****t for the days missed without service and i have paid for it. I trust that this complaint will receive the attention it deserves.