Pathetic service Cell C call centre and Cell C Gateway

I did my upgrade on the 27 May but because I did not receive my phone I cancelled my contract with the call centre on the 13 June. On the 15 June I went to the store and did an upgrade with them. Spoke to a consultant and he told me that it will take 30 minutes to have the upgrade and credit checks done. I called the store on the 17th and spoke to Bongani who said that he will av it resolved by the end of the day, never got any feedback from him. Called again on the 28th and no one answers the phone. Is this the kind of service they give to their long standing customers.