Poor Service Delivery

I phoned the Multi-choice for an upgrade, I was told to pay the difference, the subscription will automatically switch on. That was 01/11/2015. I paid even more but things became worse than ever. I cant watch anything except public channels. I phoned for further assistance to clear error code E16-4.Everytime I phone I am told to hold for supervisor whom I have never spoken too, and one time I was told they will phone back which they never did. I have spent a lot of airtime everyday I make a call asking for help which I do not get at the end of the day. Its high for Multi-choice to close their business or get a strong competitor! What ****es me off is that at the end of the month I will get billed for subscriptions that I am not viewing? How can they have error codes that they cannot clear? if them as service providers are failing to clear it, how much more of the end user??? Their call centre is useless and pathetic, I am sick of this!