Tata Docomo — no network since last 1 week

Address:

Hyderabad, Telangana

It has been almost 6 years i am using tata docomo sim and always happy with it's services, but from the last 1 week, i was not having a single signal on the network and when tried to visit any brand store in hyderabad, learnt that all of them are closed a couple of months ago. We understand that airtel & tata docomo are planning to merge and are waiting for the same, but all signals cut down without any prior notice to the customers? How rude is this? This is highly affecting the individuals as mobile number is connected to multiple other sources for connectivity.