Why am I being billed for Packet Switched data ?

Dear MTN,<br> Since my number has moved to you guys I have had nothing but TOTAL inconvenience.<br> This started with me not being able to add a data bundle for a week and I spoke to at least 10 mtn staff members that all advised me that it will activate in 24 hours...I waited and waited!<br> The above was sorted.<br> My cellular device was then ******,I went to the Cape Gate store to process a claim and one consultant ate bubble gum while I was standing(she never had the decency to invite me to sit) and I stormed out to MTN's own store in the same mall.<br> The above was sorted.<br> <br> My latest issue,you are billing me for Packet switched data and I demand an explanation was to why this is happening?I use excessive internet as you offer me a greater deal by doubling up my data bundle which works well.I have been extremely cautious by checking data bundles balance after and before each connect and I have always had a positive balance.I have purchased quite a few but have been billed in December R200 and R400 for January 2015.<br> Please do a full- on investigation as to when the bundle depleted,please dont give me vague answers like the bundles activate in 24(i waited until it reflects)<br> <br> Regards