Airtel — Airtel 4G Hotspot network is poor

I have been using airtel 4g hotspot wifi since 2015 and the speed was so good both in my chennai and pondicherry residence. But the network speed is very poor since a year back after jio's launch. Couple of times i raised this concern to airtel but the replied with standard answer to that they are working on a fix but no improvement. I was in parallel using act fibre optic network in chennai residence. But, during this lockdown i'm struck in pondicherry and i have to use airtel portable hotspot. Couldn't even attend a single conf video call without a network issue.. Very poor network.. Signal varies with 1 or 2 network tower in the hotspot dashboard..