Passing the buck

My friend went and booked in my device at the above Repair Centre, on the 21 July, ********** 0. On the 22 July the technician contacted her as she gave her details, and explained her accidently cracked the LCD, and she should ignore the messages,as he was going to order the part. She trusted him and so did I, as it is an Authorised repair Centre. On the 02 August she heard he was dismissed, and immediately contacted the Repair Centre. She was told that he said he ordered the part from a friend, and is still waiting on the part. She spoke to the manager and explained everything to him. Today the 15 September, I contacted the manager, and he said sorry he cannot assist me, as the device was booked in by someone else, after I explained everything to him, and even gave him exact dates, and job number in question. Also, after I told him I was with the friend the time she spoke to him on the 02 August. Still he does not want to assist me. All I want is my LCD replaced,as it was working when the device was handed in. It is really not my problem if the technician is not working there anymore. At the time the incident occurred, he was working there. This is not the service I expected to receive from a Authorised Repair Centre, especially a company I have been dealing with for many years.