Utterly Disgusted at the level of customer service

I registered for a cell phone contract on the 1st of December. I assumed that my first instalment would be due at the end of December, when I called in I was told that this instalment would be due at the end of January. I had no problem with this. Thereafter on the 16th of January I received an sms from my bank saying that Telkom had taken of their instalment on the 16th of January ???? I called the call centre 3 times that day. At first there were no managers available before 8'o clock. I asked to be called back before i started work and was not called back. Eventually when I did receive the call the manager seemed confused, arrogant and basically said that there was nothing he could do. I asked why was my bank account accessed without my permission?? He said he would listen to the call, when he called back he said that I had called in earlier to say I would like the date changed to the 30th. When I asked for the department manager I was told that they are too busy to call their customers back. This shows that they have unprofessional staff who do not give a damn about their customers. My guess is that they will be too busy to respond to this query