BAD SERVICE

The following query ***, ***, ***) is not sorted as yet, Numerous calls were made as a follow up to Customer Care including their escalating department. I have been sent from pillar to post without any progress. Cell-C is overcharging my account for the last seven months, instead of paying R630 excl vat but paying R797 excl vat. (Refund is needed). While the matter is still pending they blacklisted my cellphone.. Now, I am paying something that I don't have in my possession reference CLC ***. I need a refund and new phone as my phone are withheld by their security after being sent for repairs.