Pathetic client service from cell c

I'm so angry and disappointed. I have been with Cell C since July 2007 and have been a loyal customer with the same number all these years. When I app**** in 2007 i used my ****en surname got married and changed to my marriage surname. I then later went back to my ****en surname. i have been upgrading my cellphone contract every 2 years for the past 13 years and using my latest ID copy to collect the device. today because of error on there part i'm unable to receive services due to me because they fail to keep up to date records of their clients information. I closed the contract last month and settled the amount but they are still billing me and i'm unable to be assisted due to their management error and worse i'm being billed when calling their customer centre which is supposed to be free because once again an error from their part of blocking my number and redirecting it to their automated machine... a big double thumbs down to this network. there i was considering taking another package... goodbye and goodbye for good.