Onsite Solutions Doorstep Mobile Tablet Solution - DUPLICATE MOBILE LCD SCREEN

Hi, On *th of January I had broken my one plus * LCD screen so I had asked Onsite Solution to repair my phone and they had promised me that they will repair my phone with an ORIGINAL LCD screen. After repair within * weeks my LCD slowly started going blank. Post which I went to the official one plus service center to get my phone repaired again, their engineer stated that the LCD put up by Onsite Solution was duplicate. I have called onsite solutions a number of times to give me a refund but after a few calls they've stopped answering. Even after putting up a complain in national consumer forum they somehow managed to put the whole blame upon me that the LCD blacked out because of my negligence. My concern here is that if the LCD screen provided by onsite solution was original none of this would have occurred.