Data disappearing two month in a raw

In July my data bundle were depleted in 5 days and I logged a query to dispute the depletion of data. I was told that i have used up my data and i was billed accordingly. I then requested proof that i have used up all my data but i was told to install a certain app which to me sound like Vodacom would like to dictate to me as to which App i should have on my phone. In August they loaded another two gigs but to my surprise it didn’t last for a day. I called to find out what going on and i was told i have used up my data bundles which was incorrect. I disputed same again and requested proof and i was told the same story. When i insisted on getting proof i was told on the 23rd that i will be contacted back after an hour, seven day later and hour has not gone pass at Vodacom. I wanted to take two more contracts with you this month’s but i wanted to firstly resolve this issue but unfortunately because you didn’t resolve my issues i had to go somewhere else. I want this to be resolved nothing less. For the past two months you have been taking my data and tell me that i have used up my data but you cannot provide proof. I need proof that i have used up that data bundles.