The worst experience in the authorized apple store...

The worst experience in the authorized apple store.
It took about "one mouth" to fix my MacBook pro (It mentioned that the working days is around 5-7 days in the first time and claim that the replaced part isn't delivered for several time).
I have called for over 7 times for asking the process of my repair.
The service is really poor and awful.
Also, when I get my laptop back, there is several scratch on my laptop cover and B,C sides.

I am so angry but I don't wanna spend another ONE month on my Mac.
Please DON'T go to GBM for fixing your Mac.
That would be your nightmare and you will be definitely pissed of.