Ridiculous Service

In the last 2 months 2 of my mtn cellphone contracts have ended and I’ve had to call the customer service numerous times to cancel the contracts. As if that wasn't bad enough that they took forever to cancel my contracts but both my phones were unable to receive any phone calls once they moved my numbers from contract to prepaid. I’m working from home and people are unable to call me thanks to mtn and their ridiculous service. I've gone through numerous agents and not one of them is able to solve my problem!!! What pathetic service!!!