MTN BAD SERVICE

I have upgraded my contract on the 28th January 2018. MTN offered a special on the Huawei P10 lite of R239 whereas the normal tariff was R269/month. The person who served me entered the wrong code on my contract. After numerous e-mails and telephone calls as well as plenty promises from MTN's side to rectify the matter, they have up to date still not rectified the account. I am still getting billed for R269 each month, which has now escalated to R271.36. The reason I took this phone was because of the special as I am a pensioner. If MTN has a special offer, the least they can do is honour their promises. It leaves a bad taste in one's mouth and an unwillingness to do any more business with them. My wife is at Cell C which offered a special and she had no problem PLUS excellent service when applying.