Unvalued client

I took up a contract phone end of September online which included a Y7p and a sim card for R199, upon delivery of the phone and sim card i called Mtn activation department to assist me with converting my prepaid number to contract. The agent I spoke to said she did it and it should take about 48 hours. After 48 hours this was not the case, I then called in and the agent that assisted me mentioned that she the new sim card has been activated and that she will be able to assist me with canceling the delivered sim card,and that after 48 hours the number for life will b active. This was successfully done however when I called in a few days later I was told that I have two sim cards on my name that I will be billed for on my debit order date. I was not happy to hear this and contacted mtn only to be sent back and forth by the agents. I was given a *** and told that the turn around time is 7 days, 7 days has passed and my issue hasn't been resolved. I have been using Mtn for almost 10 years and I'm really disappointed to be treated like this. Today I called with my last hope, after being sent to four different agents I was told I cannot be assisted due to the migration process that is ongoing, which has nothing to do with me as a frustrated client.