Issues in samsung note 9 - Ankit Mittal - Karnal

Sir, I had purchased a Samsung note 9 from Samsung authorised dealer for Rs.59k.Due to certain issues in the phone I requested repairs to the phone and phone was collected from my office by the service centre's employee, 3 days ago. He did not provide any job sheet or other document or job sheet to me at the time of collection.Today, when they came to return the phone after the required repair, I noticed many scratches on the phone, which were no present earlier at the time when the phone was collected by Samsung team.I have noted this manually over the signed acknowledgement that they collected from me after delievering the same.Samsung team is denying the same and as per them these scratches were there at the time phone was collected from me.However nothing in writing is there regarding the state of phone at the time of collection...as Samsung team's member who came to collect the phone was not having any job sheet with him at the time if collection...pls advice