Blame the courier and too many problems on the system

Honestly, Cell C does not deserve even 1 star. My new contract is meant to kick in today. My previous contract only had data as I did not need to phone much before. Work circumstances changed so when I renewed my contract I took 300 minutes, 4GB data. I received my phoned and numerous notifications saying my contract end 10 October Today, the new contract did not kick in. I spoke to Lydia from Upgrades department who said she had escalated it to her Team leader Kerry Lee and they would phone me back. By 5pm nothing. So I phoned again, sat on the phone with call centre agents for 26 minutes waiting to speak to the elusive "Team leader". Eventually I got put through to a team leader, Brian, from a different department, since by now the other team leader had gone home. I was told that courier service never notified them that I received my phone in JULY already, and so my new contract has not been activated. They ask what my problem is and what I need. I need my new contract because I need, especially, the minutes on the new contract. So he says he'll load minutes for me, only to come back and say, their system will not allow him to add minutes. 50 Minutes and I am none the wiser. I cannot believe the ridiculous excuse and how even their own employees cannot provide service because of the "system". This has not been and won't be my last issue with Cell C, I'm sure.