No help / response with ongoing billing enquiry.

We have an ongoing billing query with Autopage since at least May 2014. We contact them on an ongoing basis, and yet receive no response, no reply when they promise to revert back to us, and to date no redress.<br> <br> We had a Straight-up-100-top-up contract them, which should not have exceeded more than about R200 p.m. It came with free minutes, sms's and data per month. However, for several months, the bill was well over this amount. For example - May 2014 = R358