Xiaomi India — charges money in warranty

Address:

110096

I have an issue related to my phone redmi note 7 pro that its headphone jack is not working properly i went to that xiaomi india service centre noida sector 18 branch they told me first you have to change your display bcoz its damaged... My display is not damaged and i have issue on my headphone jack not in my display. They say u have to change its our policy... I purchased my phone in may 2019 its in warranty... And then they also say whole motherboard has to be changed and i have to give the cost to the service centre they say that phonr is damaged...

Please help me
What should i do now...