Terrible Service from Mweb

I was contracted to Mweb for 12 months that they will credit my Sim Card for 2GB each and every month from 01/11/2013 till 30/11/2014 and the agreed subscription fee was R89 every month.<br> They have been deducting R89 since it's inception date. Last month of the contract they deducted R442.70 on 28/11/14 and R353.70 on 31/12/2014. I went to the bank to reverse the two amounts because I was not happy with the two deductions made in my account.<br> <br> I didn't finish my 2GB in Oct, Nov and Dec but they claimed that I over used my 2GB but there was no proof that I have been using internet excessively. I then wrote them an email on 17/11/2015 to cancel my contract and they haven't cancelled my contract till today but they are continuing billing my account by sending statements of the internet that I don't use at all.<br> The latest statement received from Mweb is that I owe them R989.<br> <br> Please Hello Peter assist me with my query.<br> <br> I believe that MWEB are ****** why charging an amounts for Gigs that were never used and change the agreement of R89 to a different price.<br> They don't want cancel the contract if they receive a cancellation letter.<br> <br> Please Hello Peter help.<br> <br> <br>