Got debited unusual R1500 and R1800 oct & nov

I got an unusual debit of R 1500 in October on my cellphone contract . I went in to Randburg sanlam branch to query and got told for the first time that my account was not capped and the amount was a charge for downloads on my I pad account. I was informed A cap was then app**** on my account . Today 1 dec another debit of R1800 was app**** on my account again. I called 808 the toll free call centr to query it. Spoke to Mapaseka at about 6 am , she explained on Mtn system my account is capped but on the network the account still appears uncapped so she will log a request to credit back my account in 5 working days<br> <br> 1 my call got dropped thereafter they have my details no one bothered to call me back <br> 2 how sure can I be the first debit was justified, <br> 3 how do I know indeed this time it's an error on their part and it wasn't in October<br> 4 how do I know I won't get further inconveniences in future other unusual debits<br> 5 what kind of a system is it that you get charged, they explain something, you buy in . You get charged again and get a different explanation