No help from CellC Call Centre after trying all channels

I have been struggling to change my debit order details since end May... I called the call center twice - and every time they say it has been changed and a debit will be run the next day... without anything happening. I emailed customer service (case number ***) without any answer... and emailed again... no answer. I tried to log a complaint on the website.... but when clicking on the send button nothing is submitted... Also tried online chat on the website.... "No consultants available". This is very saddening - as I actually like Cell-C... But since the Cell-C towers have been switched off my reception is VERY bad, and seems to me Service has also dropped :-(