My brand new MacBook won't play any DVDs. Why and what can I do to fix the problem?

I have had this MacBook for little over a month. It's brand new and I have tried nearly everything for it. I'm losing my patience with it, and am regretting ever purchasing it. I cannot play a DVD on it using the DVD player because the DVDs aren't set to the same region. The program won't let me change the region either (I know all about these regional DVD permissions, and how you're only allowed 4 changes, etc.). That's not the issue. I'm using VCL media player now, but the drive won't play anything through that either. The drive isn't broken because I am able to watch "Underworld" on it but not "T2" or "Wall:E." Once again, I cannot change the region because the only region the program allows me to change it to is the region that should be allowing the DVD to play on (Region 1 for N. America). I also wrote a new script for the DVD player that allows it to play through VLC each time I pop a DVD into the drive. Still, it isn't working. Are there any other programs that let me play DVDs that won't give me all this s*** about regions, permissions, etc.? I thank you in advance for any help you can give. I'm becoming very frustrated with Macs in general thanks to this and other compatibility issues I've been having.