Hero Motocorp — Complaint about my Maestro edge purchased on 4/12/2020

Address:

# 1171, Saraf Galli,, Shahapur,

I have purchased hoping no problem scooter, but my Maestro edge KA 22 HG 6741 from Nagashanti motors Belgaum, scooter is giving slope speed engine off problem and very low mileage of scooter, I visited goa Magnet wheels, they said software and O2 sensor problem, but again when I was in Belgaum I visited Nagashanti service on 28th March 21, they said software is upgraded but computer indicates not good health (RED) so O2 sensor needs to changed, I said do it, but they say not available, they ordered but till today it's not delivered they say,
My scooter I canot youse it for past 15 to 20 days because engine gets off on slow speed, engine indicater on, and very low mileage. I am fed-up of this new scooter. What I should do now.