Poor Customer Service

CellDirect called me because my contract is due for upgrade. I explained that I am happy with current phone so they offered me a data package which was a 5G p/m on a 24 month contract which I agreed to. I clearly explained to the agent that I hope I do not encounter any problems with loading this benefit as I donot have time for any inconveniences[Murphys Law]. Her name was Tamron - she assured me that all will be ok - she called later in the day to say my sim card is old and that I need a LT simcard - I already started to worry - anyway they couriered me the new simcard. I then called Cell C on 084 135 - after going through the extensive process of explaining what I needed and then the security checks, I was told that I need to pay R50 for sim swop - I was not aware of these additional costs . I called CellDirect again to query this and spoke to Fatima Abrahams - she said a waiver SMS will be sent to Cell C - I called Cell C the next day and went again through the process of explaining what happened and then the security checks only to encounter another problem - the RICA Serial no of the new simcard was not allowing the sim swop process to be completed - the agent said that the system is telling her that the new sim "cannot be used"??? She advised me to tell the upgrades dept that they need to release or register my new simcard - she transferred me and the upgrade agent [after explaining him the whole process again] advised me that he never heard of this problem before??? I am absolutely frustrated and so inconvenienced for all my time that was wasted on the calls to Cell C. I would like to cancel the 24 month contract on the basis of all these issues which is attributed to Cell C