Cell C worst customer service

My phone was soft locked on Friday because I have reached my limit. I got a notification on 6Feb that my data bundle was depleted. I bought 300mb on 10feb. After that I never got a notification again that my data was depleted. So because CELL C never sent me a notification I had no idea my data was depleted and due to THEIR NEGLIGENCE I am stuck with a bill of R2200! Then I was phoned yesterday by customer services, I think her name was Thumelo. She said my cell phone bill was only R717 and that Precious, who told me it was R2200 on Friday was wrong. She said she would follow up on Monday to get this sorted out because I paid R1113 in cash on Friday. NOW a debit order of R717 went off for CELL C. I'm am not able to pay my rent for March due to the negligence of cell c for causing me to pay R22000and and now my other debit orders are going to bounce back because R717 was deducted for cell c via debit order. AGAIN it seems cell c's admin is the worst and their employees have no idea what they are doing because Precious told me one thing and then Thumelo told me something totally different! I want a full refund for usage from depletion of my 300mb handle AND R1113 I paid in cash.