Hero Motocorp — Service center compline

Address:

Medavakkam

I give my bike to service in service centre, they give me an estimate for my bike as 16000 rs, but they didn't check my bike and informed me, at last they call and give me an bill amount of 25000 above, but they didn't ask me any approvel to change the spare parts of my bike, they change without asking me, know they were saying to pay the full bill amount, please take an action immediately.