Mtn the worst company ever

Got a call from mtn 30 apr 2018 to do an upgrade on one of several numbers I have with them. I was told if I don't want to do this I can decline as long as I do it within 7 business days. After receiving an email from mtn on same day Monday at 3pm. In the email it states what number to call and ref number to quote making it sound so easy. When I tried calling ( ********** ) back I held on and was transferred from pillar to post as no one new who I was and what I'm asking for. I specifically told one of the agents that I don't want the new upgrade contract and needs to be cancelled and run on a month to month basis. On 4 may. 9:55I sent another to pls cancel the upgrade and continue as discussed on the phone. At 10am 4 may I sent another email saying how frustrated I am with the service and how non existent the service levels have become. 8 may 11:38 another email no response yet. 9 may 7:22am another mail no reply yet. Only for the person who uses the number in question to get a call today from a rude agent who spoke to one of my family members using the phone for an upgrade when she declined the phone was put down and the phone was no longer able to call out. When I made a call to mtn today another 12min later I was assured that the error will be fixed and the family member will only be able to use the phone with 24-48hours which is unacceptable because of your incompetence and **** service levels and no people that know how to deal with long standing clients like myself!!!!!