Bad service

I've been trying to do a sim swap with Cell C through their customers care. It's over 2 weeks now with their customer care, if it's not the error with their system, it's the security question that I fail, or it's the OTP no that I don't receive. Mind it's the same security questions they ask, how I fail I don't know. Yesterday I spoke to a rude girl Lerato who told me I should watch my tone. I asked to speak to the manager she took my no im still waiting. I called again this morning another lerato girl told me it's the system again. I called contract cancelation spoke to Ntando, she said she cant assist with the cancelation I should call customer care and ask for manager. I've told to leave my no the manager will call me back. I have data from last month that I cant use, data loaded this month that I cant use. Why must I pay for data that im not using? I cant wait for all my contracts to expire then I don't renew them.