Horrible service and experience.

I am extremely disappointed with the service I have received from Cell C. I firstly tried upgrading my LTE 200GB contract as to continue with the service. After more than 4 calls I still was not upgraded successfully. Finally the last consultant I spoke to ensured me that I was definitely upgraded, only to be called two days later by the upgrade team of Cell C to ask if I want to upgrade? How is it possible that an upgrade can not be done in almost a month? Due to the incompetence of the upgrades department I was charged, without my consent almost double my monthly amount, “as the promotion had ended”. After trying to find a solution with their customer service department, and being told that they will not credit the additional amount debited by them, even if I were to then sign for another 24 months, I decided to cancel my contract. Off course I should have known that this will not be an easy exercise, if the upgrades are horrible, how much more should the cancellation be? I was entirely correct. I was informed on the 6th of April (a Tuesday after the long weekend where their cancellation department was closed) that If I cancel I will still be billed in May AND June?!! How is it possible to be billed 60 days after cancellation? I am still awaiting ANY feedback from them. What an absolute horrible experience. If I could give them 0 stars, I would!