Honda 2 Wheelers India — Unusual sound of back disc brake

I purchased honda hornet 2.0 on 5 December 2020 and right from that day disc brakes of my bike started making unusual sounds.
I logged a complaint about it on service centre and they didn't give me a satisfactory solution and they charged me for this service and result was not satisfactory, Workman at service centre says that we don't know how to solve this problem. Sorry we can't do anything., except from this problem many other small problem have been there like self start does not work, engine heat Just in few kilometres of slow riding.
I don't have the capacity to go every time i have my own work to do.
Service showroom of Honda in Bhiwadi is worst they don't call and update about my condition of bike, i had to go there and ask myself if my registration certificate is completed or not staff is careless.

I m attaching a video proof with my complaint, listen the sound carefully you'll hear the noise at present in video sound is low but in reality it is harsh and loud.

This product is defective. I want full refund.

my name- mayank
my vehicle no- RJ40SH3803
MOB NO -[protected]
bike model- honda hornet 2.0
mob no[protected]