Tata Sky — We are not getting some channels

Address:

Thane, Maharashtra, 400602

My customer id is [protected]
Since friday 10th june, we are not getting some channel like star pravaha, animal planet, discovery etc.
We registered a complaint on 11th june, 2016. But till date our complaint is unattended. One technician visited on 11th june, but he was unable to sort out the problem. We are fed up of doing continuous follow up with tata sky.
Since i have subscribed annually, i cannot change our service provider but, after that i am seriously thinking of changing the same. We are old customer of tata sky (More than 10 years) having a well known brand we are facing so many problems.
In spite of subscribing the channels we are not getting the service. This is very shameful. I want a refund of subscription from 10th june, 2016 immediately.

Regards?
Smita