Worste Experience EVER!!!

My partner and I called Cell c on the 21/09/2015 to blacklist 1 of our devices that got ******. Christopher was the agent @19:08 we started the conversation and all we wanted was to blacklist the phone. After spending 30+ minutes with him and him telling me that he is self-managed as I requested to speak to a manager then he realized I am really upset and +-10min later he says let me call a manager which is Donovan Manager. He said the exact same saying the blacklist team works from 8am-5pm. I can't understand that most people get ****** after 5pm and no1 in the call centre could manually do this other people had access to the phone. I then said ok, here is the test, please have someone call me and he said by 09:30 on 22/09/2015 they will call me and give me the ITC number. Guess what, I called at 10:00 on the 22/09/2015 because nobody called us back. Then I had to have another heated conversation! Cell C wants to offer people up to R10 000 to buy them out of their other providers contracts however they can even assist in time of need. No1 on standby or a manager to override and do it manually... Please send me the call as I would love to play it on YouTube and all. BAD BAD service