Orient Electric India — Orient Aeroslim fan

I bought the fan over amazon on 7th september 2019. It was working fine. The regulator was working fine too but all of a sudden the fan has stopped reacting to the remote and the orient app too has not been able to fix the problem. It switches on with the switch but can't change the speed. It is fixed at the lowest speed. It's a very expensive fan so can't just change it. It's not responding to the remodte so can't even turn in the light in this fan or moreover do anything about it. I tried calling the customer support number but it won't connect. Please help