Incorrect charges and account issue

I have been trying to activate my private caller function from the inception of my contract with no success. I recently went to China for a month and was unable to activate international roaming, MTN simply told me that there was a problem on the account. After arriving in China I phoned MTN again and they apparently did something, however it still did not work. Out of desperation, I activated every service I believed to be free through the website in the hopes of triggering the other services to work as well. I activated every service that charged R0 for "Activation charge" and R0 for "Monthly fee", however I was told that this does not include the actual price of the item, which isn't visible at all. I think that this is very misleading. Thereafter I deactivated every service immediately but two services are still charged for every month even though it is supposed to be a once off service. I have phoned numerous time, queries have been logged, escalations done to no avail. I need these services cancelled and refunded, my private caller function enabled and whatever issue is present on my account fixed. I am also unable to change my address on the website.