Xiaomi India — cheating

Address:

Allahabad, Uttar Pradesh, 211001

I live in allahabad uttar pradesh
My redmi 2 prime display got broken then i went to authorised xiaomi service center in allahabad for diplay replacement and paid total 3008 rs including gst (Rocket science) actual cost were 2199 + 350 (Service charge) + 18% (Gst)
Then i found that the replaced display have scratches and dent over the corner, in clear words that they replaced display with old part not with the new part as they are charging such a huge amount and inspite of that they are cheating customers
When i asked them that’s it’s an old part you had replaced with then they admitted and said will replace it with new part after diwali