Sony Z3 screen/crack guard

Good day, I'm not only upset but soo irate about the service received last night and the fact that my screen/crack guard was removed for only a software update by your internal technicians? When we booked in the phone clear instructions was given... i was told by the consultant that only if it goes to JHB the guard be removed. Based on this i signed and in addition to the signature , your service consultant made additional notes on the form. The consultant who assisted me when i collected (Ticket number A48) could not care a hoot of me voicing my concern and unhappiness. Instead just kept of scripting of what the software update does.. blah, blah, blah. I would appreciate a replacement guard (at your expense). Your speedy response would be appreciated. Thanks