Onsitego — Refused warranty because they said my mobile physical damage

Address:	Mohali, Punjab, 160071
Website:	www.onsitego.com

Onsite customer care executive picked up my mobile on Feb 06-2017 that time he checked properly my phone (iPhone 6Plus ) that time no physically damage.
but after 2-3 days i got mail from onsite that your phone physically damaged so we can't give warranty of your phone. But my phone that when i handover not damaged even before pickup onsite customer executive checked properly.

then how can they said my mobile physically damaged.
if my mobile physically damaged he can mention into receipt which he give me after pickup my phone.

Executive who pickup my phone not build if i found my phone broken then he can mention into receipt which he give me.
even a 5 yr child can tell phone broken or not?
My phone is not broken onsite damaged my phone.
please help me.

Onsite broke my phone(iPhone 6plus) now making issues that i handover damaged device.

Please check attachments
as customer care executive who pickup my device.
invoice
Receipt which he give me after i handover my phone

Please help me