HORRIBLE CUSTOMER SERVICE

I had a contract with MTN, I called to cancel it and was advised that the contract was cancelled and everything is in order. I received a confirmation on the 25th f May that the contract is cancelled. On the 6th of June, I received an sms advising me that MTN has decided to cancel my contract only from the 6th of July and they are going to billl me. I have made +/- 10 calls to date and every time I call I get different feedback, actually the consultants are more confused than I am. Now I havent been receiveing calls from the 7th of June, losing out on business as people are not able to get through to me....apparently my number no longer exists. I phoned to resolve this on Monday, I was told that something was barred on my line and the consultant that I spoke to "apparently" sorted the issue out, I was asked to switch my phone for 15 minutes and everything will be sorted. To this day, my line is still not working, I am losing out on business and MTN seems not to give a hoot about this whole situation. I just get sent from pillar to post and never get any help. I'm very frustrated, MTN really useless......having been a loyal contract customer for more than a decade - i find this whole treatment immensely disappointing. All I am asking is for someone who knows what they are doing to call me and sort this mess out, its unfair that I am the one who is suffering and losing out on an income because of your incompetence.