Incorrect debit amount

<p>I've been using Yellodata for approximitely 6 months, the first 4 months I had no problem and was actually enjoying the service. The month of July 2016 they debitted me an anount of R284.65 and not the agreed R99 FOR 1gb data. I phoned them and queried it, they told me that I used more data for that month and I accepted the situation.</p> <p>The next month, August 2016, they debitted me an amount of R423.69 and I know for a fact that I didnt use more data that was allocated to me in the beginning of the month. I contacted my bank immediately to reverse this debit order as they are *****ing my money.</p> <p>The last 2 months there service has been absolute bull **** and if they cant rectify this problem I will not pay them anything anymore and they will lose YET ANOTHER CLIENT DUE TO PATHETIC SERVICE.</p>