Airtel — heavy losses due to no incoming while on international roaming

Address:

Hyderabad, Andhra Pradesh, 500003

I have taken international roaming while on my dubai trip by 2996 recharge because my business call r very important for me but to my surprise there was no incoming throughout the trip but outgoing was working fine and from day one i made complaints by all modes but no help from there side due to which i incurred 5-7 lakhs of losses, after coming back i wrote to appllete authority but they said sorry ad reason was technical issue
I want to take them to consumer court and recover as much losses as i can
Please help