Most appalling service ever!

I have never experienced such an appalling service! I am shook! I sent an email to *** on the 23rd of April 2026, their SLA was 72 working hours. Till this day, I haven’t gotten any response. I cancelled my contract with them in 2022, to my surprise, MTN has flagged me for not paying their contract, a contract that was meant to be cancelled in 2022. I reversed their debit order then but when I visited their branch in April 2026, I leant that they’re still billing me in 2026 & there’s provision of data as of March 2026. There’s no way your systems are this broken that you keep billing someone for a service they haven’t used in over 4 years! I need this sorted ASAP.