Cell C Customer service

on the 25th August 2020, CellC cals m e to inform me that i am due for a upgrade, they inform me of the upgrade option and i accepts they then send me the black phone where i wanted the blue one i did not sign for the parcel nor took the phone. Since the 25th August i have been calling in everyday to have this sorted, so yesterday 9th September 2020 there was a guy that called me very nice and friendly, they send us a form to sign we sign and send back and now today we get a call to state that the contract has been canceled. They are the worst at customer service and does not resolve any issues they just cause more issues.