poor service

I sent an email to cellc customer care but still awaiting feedback on my complaint regarding my upgrade I'm so sick and tired of cellc and really don't want the upgrade with them anymore as they do not acknowledge their loyal customer s.I done an upgrade I February for the Samsung core which was approved and then the courier came to deliver at my work and they did not find me there as they came after they came when I was done with my shift I contacted courier and was advised he will come the ft<br> Friday when I phoned he was not at work I then phoned retention s they then told me order was returned two days later I phoned to do upgrade again I was advised phone was out of stock and was offered Samsung A I was then told my credit score needs tof be updated with credit vetting department and was told by the person I spoke to that she will contact me this was 2 weeks ago I'm still waiting and I refuse to pay my account which is now outstanding because cellc can't please thei customers but they just expect payment.**** This ****