Tata Sky — If Tata sky will not solve my problem in short period, I bound to buy another connection

Dear Sirs
I have a connection of Tata Sky sience 03 years, My id No is [protected], But I am uable to view some channels due to upgradation of MPEG4 technology. I have called to customercare somany times(from 07.11.13) to change the set top box, but till date couldnot change of my set top box. When I contact to customercare, they are telling no stock of set top box in your area from first to now also but set top boxes available in this area, Shopkeepers are telling, if you'll give Rs200/- then we'll give a new set top box, so I have stopped recharge my set top box from last recharge, and also customer support telling, we'll refund from which date u are not able to view some channels. If Tata sky will not solve my problem in short period, I bound to buy an other connection.