Billed R500 extra monthly/Still no statement sent

Every month for the past 3 months I have contacted cell c and have requested they automatically send my statement via email and yet every month I am having to contact them to request this followed by a phone call of me having to answer a whole bunch of security questions. Each time these questions are completed, they assure me it will not happen again and that going forward my statement will arrive in my email every month. This is now the fourth month I am going to have to contact them requesting my statement because once again, clearly they have a bunch of idiots working for them. Evert month I am having to contact them myself! Every month I am apologised to by someone new! and every month the same dam thing is happening again! I DO NOT HAVE TIME FOR THIS! Just this morning I also had a look through my statement and realised that instead of billing me the R734 signed for in my contract, they have been charging me an extra R500 bringing my bill to R1222 EVERY SINGLE MONTH! I am absolutely disgusted with this service and will be cancelling with you asap!