****ed off for days

My Huawei P20 Lite. Was sent in 21/08/2019. The official Service weekend they had. I received the phone back from them on 08/10mm 2019. I would like to deal with the manager or owner not even a complaints department. The phone came back and was sent by courier. The problem I have is that the sim card holder/me card holder is missing. Uppon further observation I find the back cover which is normally flat is now raised on one side. I put the phone on charge but the charging pin is loose and it was not loose when sent in. The phone is not even switching on. Only get a red flash and nothing else. The phone technician named Sibusiso really ****ed up this phone and I want to know what you going to do about it. Service Request No: SR*** Maintenance no: RN*** Phone me ***. ***.