TATA Indicom - No repayment of my deposit!

I was receiving one landline tata indicom phone with internet service, as i was receiving wrong information from sales executive i was decided to disconnect this connection immediately on the next day of receiving that phone, for that i was giving intimation to helpline for disconnection, as they said my connection was disconnected withing 15 days from the date of purchase and also sales executive was took back my phone by giving receipt and told me that i will get money back withing 15 days, since i was not getting money back i have called ur helpline and told all story but they told me that u will get ur refund back within 3 months from the date of purchase i was waiting till 3 months still i m not receiving any payment, i was purchase that instrument in september still i m waiting for my refund, can u tell me what the hell is going on, when i got my refund back?

Please give me ur reply as early as possible otherwise i will suite a case against u in consumer court...