^ Try their emailing their nodal officer if there is no response from regular CC.
My D Link modem died and I got it replaced with Huawei. It is now able to hold the sync at 87000 Kbps and I've been getting >80 Mbps at all times.
Also competition is kicking Airtel's balls so hard, they are going to deploy overhead fibre cables to individual homes as well. The tech who replaced my modem told me the they already have it ready in some areas and will cover 90% of Chennai in about six months
Yep. Digging up decades old copper and replacing them with fiber is simply unrealistic when Jio threat is looming. Airtel seems to have fibre underground till local exchanges or even street DP boxes, they are going for overhead cabling from there to individual homes.