A very ****ed off customer right now

Last month I wrong a review regarding my unhappiness about the service I got from one of the branches at Cell C. I got a call from Palisa stating that she will be handling my complaint. Last week she calls me and tells that all has been sorted and that I should get my refund for the wrongful billing this month end as she in her investigation have found that my complaint was valid and that the branch confirmed my issue by stating that I never used the Tab that I had been billed for. Now last week instead of getting my credit I get debited more that R2K for what I don't know, because as per my initial complaint my fibra was not working and AGAIN I had not SAMSUNG TAB with me as CONFIRMED BY THE STORE. My fibra was fixed last week Friday and Sunday it stopped working again. It is not a rooter issue as I tested it, it just keeps disconnected from the internet.

My question is AGAIN, what exactly am I being charged for since: - the WIFI, FIBRA or whatever I am meant to get from CELL C is not working? - and the TAB has never been in my possession since after the three that I bought it?