Overcharged statement

We received a statement dated 9 Dec 2015, yet there are 2 months and more, worth of charges totalling R1,046.60. The bill is usually R344.11 to which we pay R400 monthly. We replaced our previous service with the SH Advanced and was told it will be approx R200 more, so why is this approx R800 more?! We didnt use this new service yet as we, on 2 occassions reported that the lines were faulty as the cables were ******. I received an sms advising that this has been restored but up to this day nothing has been restored! I want to know what all these additional charges are and how I can be charged for a service I never used! There are additional numbers on the statement as well that does not look fami****. We are not going to waste our time by calling in becoz we are put on hold for ages. Can someone responsible please give us a call immediately as we are not looking to pay for something that we are not liable for.