Airtel — Waiver not provided

My Airtel fiber wasn't working for around 9-10 days in the previous month for which I was promised a waiver.. I called almost 15 times and each time I was told that I'll get the waiver but until today I haven't got it. Even drafted an email regarding this. The service of Airtel fiber has been most pathetic recently. I had to call many times but there is no help from them. I have decided to stop using Airtel and I'm not going to pay them anything for the dismal service anymore.