What else do I need to do!!!

I have been experiencing the most horrible service from RCS from last year August. After numerous phone calls to and from RCS I still have no idea what is going on. For some reason, which is different every time a new consultant phones, my account is in arrears though I sent POP every month. After asking for a detailed statement for months to reflect what this amount is for in October, I received a statement for the 1st month that I joined. Which was 8 months earlier. a Janine phoned me a couple of times stating that my premium had increased. I have been paying manually since I do not trust them after these calls. After speaking to a few other consultants they informed me that there is no Janine employed by RCS. So who has all my personal info then? I have emailed the manager to no resolution. If they want money they hassle me over the phone but when I try sort it out I can't get any help from no one? I asked for my signed agreement which I still haven't received. I do not get monthly statements at all. Every month the amount owed is more. When asked to be put through to accounts I get put on hold and cut off. They are not sticking to their own T& C's or pre-agreement.