Blu Ray Drive issues on my new xps m1530 laptop

Hi guys and Moderators and Technical

 I have spent days upon days trying to resolve this problem with my Dell XPS M1530 2.0ghz dual core 4 meg ram Blu ray machine. Upon receiving the machine i rented four blu ray movies and could only play 1 out of 4 discs rented with Dell Media Direct . Spoke to dell technical and reset bios and full system restore with all discs provided. Dell have since sent an engineer to replace the drive and problems still persist. Dell have now sent me Dell application cd Cyberlink Power Dvd Dx 7.0 software for dvd playback after promising to send me Power dvd 8.0 ultra which as i understand is the only software that will play all Blu-ray discs without problem. Please can some one help me resolve this dilema as i am frustrated beyond belief that Dell knows that this problems exist and that the huge volume of xps returns are being sold off through resellers is testament that the blu ray functionallity in dell machines powered by Matshita drives and playback software Dell Media Direct powered and designed by Cyberlink just does not work. All i can say is that i am just the little guy in this chain of current Dell |Customers and cant believe that Dell would expose such a brilliant new product to the market with such a inherent flaw in the software/hardware ,and lose profit and so many potential high end customers who embrace technology only to return the product within 7 days only to re sell the product to re sellers with the same inherent flaw in software/hardware, has this globally admired brand now lost it's shine to capitallism and become so big it just does'nt care and passes the problems on.

 My suggestions Dell, is to  set up a specialist help desk within your technical team to address these issues and also to train staff to better train staff to re-direct blu ray discs issues to staff who are specially trained to deal with these issues instead of spending hours and hours pursuing non productive fixes that resolve nothing.

How come Dell has not not acknowledged this problem as honesty would have been the best policy as there is no reference to this issue except by frustrated end users on forums around the world in the dark about what to do and how to fix it, or the lucky ones who sent there machines back early.