False advertising/over billing/data depletion

Good Day,<br> <br> I am so disgusted to the service received by MTN. Firstly i've app**** for a contract: Blackberry Leap MTN Any Time 50 top up contract subscription fee R159.00 pm x 24 includes R55 airtime value, 25 sms, BIS plus Bonus 30GB data as advertised. I have been billed the pro rata rate (R237.00)which has been deducted off my bank account. i have received my new bill of which I should be paying R159.00 as advertised, instead my account is R218.00. Secondly, the bonus 30GB data was removed within the month with out any indication of limited time that i could use this data. I still had over 20GB left. Lastly, why do i have to top my data when it was advertised this contract includes BIS?? I have done a screen shot of this ad when i did the application and no one has advised me any different. In fact the only email i received was from a Consumer Post Paid Call Centre Agent asking me should they deactivate my BIS?? REALY??? I have kept all email correspondence upon signing my contract (07/12/2015) up until today 26/01/2016 with all back and forthing. All i want is the contract deal that i signed up for...