Cell C is not worth the money and no customer servicve

I took an upgrade with Cell C where i got a roaming internet device with Huawei. I had to get a new sim card which would then need a sim swap. I received the new device and the new sim card. When I called they said they had system issues and that some one would call me within an hour. WELL it is now a month later and still no phone call, however I have had 7 phone calls with regards to insuring the device. I have told them that i will not insure a device that is not functional and not working due to no SIM SWAP being done. I have yet to receive a phone call to do the sim swap and am paying for a device I cannot use. Maybe we should take this further... What would you say to this.