Airtel — no service on airtel sim card.

My airtel number shows no service from 23rd march. I tried all possible solution like putting out sim and reinserting, switching on and off, also tried putting sim in another phone but all in vain, i called customer support and they gave me a solution to change sim card but at this hour of time thats not possible because of lockdown so need to wait till lockdown. But i am concerned about the tarrif plans which is going waste as unuable. Please resolve this issue.