No and very bad signal yet I receive a R4000+ bill

Your query with reference number *** has been escalated to Themba for assistance<br> REQ***<br> Two reference numbers with mtn. No changes since my first complaint. <br> <br> Receive my account - I must be permanently surfing the net, have no work to do during the day and don't sleep at night!!!!! Total impossibility for me to have used data to the value of R4000 !! My 2Gig data bundle disappears in about 3 days after receiving it. <br> I always carried over more than a Gig of data every month! Since My upgrade things has gone so crazy!!!! I don't surf the internet, I don't download video's or games. I don't have programmes on my computer that forever needs to update. The account is going up and up every month. I don't have R4000 for this account. <br> The account is up and up every month!<br> <br> On the other hand there is always a signal problem. I have logged complaints for the past 3 years. I find it difficult to even open a email. To save one page takes forever because the modem disconnects and I get a message - Insufficient Network Coverage/ You are not connected to a registered network! This is so pathetic. I will be porting all my numbers by the end of the month!!