Sorry to hear you have had so many problems. I bought Lock On Gold as soon as it hit the shelf here in Chicago, IL. I did not have to go through any of the things you have as my FC disc was good.
I did however have a problem when I bought Operation Flashpoint Gold as the main install disc was bad and I had to wait 2 weeks for a replacement so I can understand how you feel.
I hope you get it soon as it is great when it all works.
Good Luck,