HTC India — mobile given for dust removed but they return mobile with defective display

Address:

Surat, Gujarat, 395007

In htc service center of surat i have given my mobile for remove dust from fron camera. For this they charge rs 935 and they return my mobile with defective display and now they say you need to pay 9000 for new display. Please take action against this service center.
Below is detail of service center
Shop no 2, plot no a 25, a 1/2, ground floor, swastik plaza, main road, udhna, surat - 394210, near j p bakery, opposite teen rasta brts bus stop

My mobile details is below
Htc one a9 32gb 4g
Item code - bd1059738
Imei number - [protected]