DishTV — I am not able to see channel

Address:

Mitranager Beed

Vcno [protected]
I installed new STB in month of Nov
and recharged for one year and suddenly all channels disappeared
I called technician he took 15 days to resolve problem and he exchanged box
Now after one month same problem And no error no see on tv now technician saying you gave old STB from Dish company it's not our problem
That's why occuring same problem
I don't like your service after calling customer care they also help less