Hero Motocorp — Misbehave, extra amount and bill amount

Today I went to shri Balaji automobile muzaffarnagar to repair my bike (splendor plus bs6 2023)
My bike guarantee is still remains
There in the agency they checked my bike and exchange damaged parts of engine for that they charged 200 rather than my bike's guarantee is still remains for 5 years and even they did not mention this amount in the bill.
For evidence proof purpose i tried to shoot video but some of employees started misbehave with me and mentally harrasment with me.
Please do something