Shocking Service

MTNs service is so bad I decided not to renew my contract which expired in January. Unsurprisingly their shocking service continues as they billed me in March saying I never terminated the contract. I have email evidence in December and phone calls throughout January requesting contact termination. They ported my number to another network, surely that in itself is proof of contract termination. I have been their customer for nearly 30years and they didn’t make any effort to retain me.