bad service

My line was barred after I had paid my bill for the month. When I called in to query this I was told I had exceeded on data. My line is a top so I load my own data, the lady I was speaking to told me my line is an open line. Now how is this possible as I have always been on top up. Then last week I got a call from Wiseman who was offering me value added services. I told him that I was not happy and he confirmed that they are experiencing problems on their side however they will unlock my line. I made it clear that I will not pay the 179 rands that was for exceeded data as this was not my fault. Now today this amount is debited on my account together with the Amount Due For This Month. This is seriously unprofessional and bad service. I even called in to cancel the value added service because of the service I'm getting