No data in 3G and LTE drains battery

Since apst few months I have seen that LTE draining my batter when I am at home or at office. All used to be fine before 2 months and no issues. Now at night if I leave phone with 40% battery by morning it is dead. IF I switch on 3G, no data comes/goes. I have been thinking of complaining but did not have time and few weeks back I saw a report on Mybroadband on this issue. What the hell are you doing with the service? I have been using ur services for more than 4 years and it was never ever like that before.