Capped Data Line Uncapped - Huge Data Bill Dispute

Last month I got a bill of R5659 on my data line.This bill of R5659 .It shocked me. The direct debit bounced. I got charged R138 by my bank. On May 2, I went to ClearWater MTN to query the huge bill . I was told that the line was an OPEN line meaning once I exhausted my 2 Gig I would be billed for out of bundle usage. A query was registered on the system that day and I was promised that I would receive a call within 3 days. That did not happen. Meanwhile my outgoing calls were suspended 15 May.I got an email from Mthokozisi Mcina saying my bill was to be reduced by R1893.63 as goodwill .I was provided itemized bill without data cost.I paid the bill for phones and asked to be resumed while we solved the data issue. This wasnt done. Yesterday my services were suspended in full despite all attempts to resolve the issue.I signed up for for 2G capped but my line got uncapped without my authority. Yesterday I forwarded my signed contract to Nonzuzo Sefolo at [Email Removed] asking how this happened. He says he wants the original signed contract from branch.Today no word from anyone at MTN and still suspended. All my bank SMSs come thru these lines. I m desperate and helpless.