Ok sorry to hear your result, yes just continue to bother the repair department, maybe this time they will give you a new one.

Just today I went down to the repair office to complain about the long waiting time, been 15 days now, and they are still waiting for some spare parts, seems that I will get a new screen and new slider mechanism, they said expected to be finished next week, finger crossed that this is trye and everything will be fine when I get it back.