Poor Service from Cell C

Two years ago I got a call from one of the sales agent persuaded me to get a router with the network provider. Got the ****le delivered to my work place as promised. Got home tried to configure the device, inserted the sim card but couldn't get the device to connect. Called the technical department several times without getting any help. Resorted to call the provider before the 7 working days given to return device if dissatisfied. Was told the logistics company would come collect the device but it never happened. Two years went by were I was debted an amount of R129 for something I never used. Its now 2018 Cell C decided by themselves to continue to supposedly give me 2 gigabytes at an amount of R99.99 without any communication from me for the past 6 months after my contract should have supposedly expired. On October 23 2018 I got a call from one of their sales agents asked me if I wanted to upgrade on the contract, which I explained to him of my past experience with the provider. He then promised to upgrade my contract I got a pocket router which was delivered the following day (24th October 2018). Went home tried to configure the device but couldn't yet again connect to the WIFI . Called the customer care once again to try and activate the sim card with no luck. I then popped into one their shops thinking I would get some help I was then asked by the staff to call the customer so they could activate the sim card which I did but still no luck. Been going back and forth between Cell C customer care agents and to their stores still no luck. Everytime I call the call centre I was being transferred from one department to the next and each one keeps putting you through to another department and then they hang up on you. All of this back and forth using my time and my resources just for them to provide a service that I would be paying for yet with no service delivery since I cant get help. I spoke to another call centre agent today to ask them that may the please collect their device and afterwards will be cancelling the contract with Cell C the agent told me I would receive an sms regarding the collection of the device fron their logistics company till now I haven't received the sms. Hopefully this time around the device is collected.