Pathetic after sales service

Requested for an upgrade on the 6th September 2019 and receive the new device on Monday 9th September 2019. I appreciated the quick turn around time on delivery but the after sales service has been an nightmare. I called on the 9th to activate the sim and they told me they cant activate i have to do a swim swop, was put through to the sim swop department and requested the swop and was told to wait 2-24 hours for sim to be active. I ended up waiting 48hours with no results no activation and no feedback from cell c. Wednesday the 11th i called again and only then i was told the swop didnt go through nobody ever did a follow after my request i had to phone in and find out. The swop didnt go through because the sim delivered was already in use for another number, dont understand why it was sent to me in the first place when its already been allocated to some one else, how pathetic is that and now i was told i need to purchase a new sim to do the swop. Later in the day i got home and looked for my old sim and found the sim then decided i might as well use that. 12th I phone to request for my free 20G data that was offered with my contact to be loaded and I'm know been forwarded from one department to another with no answers and no data as per advert. Now i regret why i ever did the upgrade i should wait for contract to expire then cancelled if is this the service ill be getting for the next 24 months.