airtime and data ******

For almost a year Vodacom is either *****ing my data or airtime and after calling every week or every second week they would return it but then take it back a week or so later. they asked me to keep proof and email it but the email address does not exist. i donot have any application on besides whatsapp, the time and date. i made sure to load airtime again yesterday and made no calls but data and airtime is gone again. i donot use much data because i have uncapped wifi at home and only use whatsapp throughout the day. and vodacom cant tell me how its being used up if no applications are opened which they could see on numeroud occassions. how do we lay a complaint and send the proof if the complaints email address does not exist and the agents say that is the only email and have tried it as well and also received the error. i want my airtime