WORST SERVICE EVER - NO SERVICE DELIVERY

I have now been trying since 8 July 2021 to get certain of my invoices from Last year for my account. Despite numerous telephone calls to the call centre, the head office and MTN shops close by NO ONE is helping me. Why does MTN SUCK at service delivery? Every time that I try and do anything on my account I wait for months for feedback and basically just get told to phone the call centre, who, with all due respect, is useless.