Disgusting Service

I have been a cell c client for over ten years. Two accou ts my last account was for a R250.00pm internet bundle 2gigs on a Samsung Galaxy Tablet and a cell phone. For 8 months I hv recv my bill for the R250. last month after checking my debit orders I saw Cell C took off an amount of over one thousand rand, I am a pensioner dont work only use my tablet for browsing, emails and banking. I was told I used one and a half gigs ovrr my bundle which is impossible. After nummerous calls reference numbers going into cell c greenstone hill spending one hour there, noone can tell me why and what this extra charges was for, so I guess if they charged me R10000.00 I would just hv to shut up and pay. Who the hell do Cell C think they are, just to take the extra money I dont have and then with no explanation !! Not even a warning that i have gone over thats if i did! And all the extra large amounts charged are in the early hrs of the morning. I dont recoomend e Cell C they are *********** and dont look after their clients or even bother to follow up, so many promises and its been ten days since I have asked over and over again for <br> clarification. Still no reply !!! COMPETENT COMPANY ,!!!!!