Disappointing customer service

So a week ago I called their customer service with regards to a telkom deal that wasn't as discussed, got through to the consultant which he explained he will escalate it and a manager will call within 24-48 hours... Still waiting on that call till this day, I emailed them as well and still waiting on a response a week later, I mean does we as customers get so little respect? I told them that due to circumstances I won't be able to afford the current deal anymore, but when I got my invoice it was so ridiculously high I'm so disgusted in the manner they handle things, not even the decency to follow up Really disappointed.