Reliance Gsm — Deduction of balance

I am reliance user and have been using the no. [protected] for more than 5 yrs. Now my balance has been deducting without using any value added services and my balance has become nil due to which my official work is disturbing meanwhile i got a loan of rs.10 which is also deducted within an hour. Whenever I am calling at cust. Care I m not getting any response from ur side. So now tell me what should i do should port my this no. into another company or lodge a complaint with consumer forum.