Beyond belief BAD service

I have been waiting 2 months for a credit, I have emailed and called so many times, I have about 15 reference numbers, I even went to the store they have emailed Cell C billing and still no reply. What more must I do, they all say is they will escalate the problem but nothing ever happens. Or you get a customer service lady who gives up on you and just hangs up. It's beyond a joke. I am going to cancel two of my contracts with Cell C and I have been with Cell C since year 1 that's 20 years, clearly loyalty means nothing to them.