Xiaomi India — Unethical behaviour by mi service center in vileparle

Address:

Mumbai City, Maharashtra, 400056

Hello,
Date of incident[protected]
Today i went to mi service center in vileparle. They do not have any professionalism and behave in thier own way. They do not have manners to talk to customer at all. They logged my problem and took my phone inspection and after 30 min, they came and said you have to pay 180 rs as my phone has liquid damage.
First of all my phone is under warranty and secondly they did not tell me before submitting my phone that it will be under chargeable.
When i confronted them they told me in very uncultivated manner that we will not give your phone back do what you want.