Airtel — Postpaid bill in airtel

Airtel is providing worst services and do not respect any of their customers, they do not receive any calls. I was having an issue with my bills as they are not providing
proper given services, I updated my sim to 4G and from that date I was not getting any network, so I updated the sim and took a new sim of same number but the in Gallery that person told us to take postpaid to get the same number and it would be postpaid for 4 or 5 months but the service is not good they do not provide given data pack, do not receive any further calls and so we did not recharge further because we were not getting any data pack they are just calling and shooting to pay the bills although I told him that I am not getting any proper service and due to heavy rain now we are not able to recharge so they have just stopped our incoming calls. Very worst services in airtel, I suggest everyone please do not take airtel services.