What a dissapointment!

<p>So I got this tablet for my daughter through MRPmobile for R129 p/m. But they debit my account for much more saying that I go over my 300mb. What is strange is,once the data runs out the device cannot go online at all. So my question is how does the bill get up to hundreds of rands if this is the case? However I called and set a limit of R1 over 6 months ago. So for December I got a invoice for R445. This is unacceptable!!!!!!!</p>