Cell C Cancellation nightmare

i have just tried to cancel my fibre line as well as a sim card contract from cell-c. The contract states that i need to give 30 days notice. I tried to cancel yesterday only to hear that they do not operate on weekends due to covid-19. The lady that did the sim cancelations told me that the contract will only be cancelled on the 1st of july and that i will pay another month for a card that is not used and has never been asked for. This sim was given to me when i received my fibre line and i was told that it is a free service. they started charging me for this a year ago. Last week my fibre line packed up on Tuesday and it took Cellc 4 days to get this resolved. Only after logging a complaint on Facefook friday night ( having spend over 200 minutes on my phone with them) was the issue resolved on Saturday morning. This is the 3rd time that we have spend 2 - 4 days in getting our connection restored. I have decided to now cancel this line as well. I could not as the call center is only open till 5 and not over a weekend. I called at 16:50 to cancel the 2 lines and was only able to do the cim card as that process took 16 minutes. when they transferred me to cancel the fibre line i was told that they are closed and i need to phone back.