Mtn dishonest

I, Frances Harrison, recently upgraded my phone. For the last 10 years my contract cost me approximately R500 per month. If I ran out of airtime / data, I simply bough a voucher to top up. On receiving my new phone, I changed that monthly payment to R1200. I expected it to work on exactly the same system. But no, apparently data was being charged separately, and unbeknownst to me, certain applications run continually in the background, resulting in enormous bills.<br> My questions are:<br> 1. Why have the terms of my original contract changed?<br> 2. Why does my data not automatically come off my airtime?<br> 3. Who set some absurd limit of R6000? When I used to spend R500 on data, calls, sms, together?<br> 4. Why did the sales representative not warn me of data costs on this device.<br> <br> Personally, I am HORRIFIED. As soon as I am able to get out of my contract, I will.