Overcharging

On the 25th Aug my debit order went of for mt 2 gig data contract. I usually pay R109 a month but this month they debited R2080 rand. I phoned customer on the 27th Aug.I went on the vodacom app and saw my data was finished and only had 400mb night-owl left for Aug and my account was standing on R200.I activated my itemised billing as well but the lady could only send me my data usage from June. She was not able to send me my usage of July and Aug which is very strange. The next day I checked my account with the simcard out and another R50 was added to my billing. I phoned customer care again and then explained to the guy what happened. He locked out my simcard till the 1st Sept and migrated it to a topup 2gig.Another 400mb of night owl data disappeared as well even though my sim was out of phone and the sim was locked till the 1st sept. Vodacom technical department should of phoned me back by yesterday with some answers but I am still waiting.I would really appreciate it if Vodacom can assist me because something smells rotten with my billing.