Based on what you are saying - can you confirm that the site works every other time when installing modules - eg.. same module - different skin, no problems? If you can then it's really a matter to take up with the skin designer. It's easy to point a finger and tell people it's your problem but if your'e not getting that problem on any other skin or module or site, then you might need to check that you've got the right version of skin to the dnn installation.
At worst you can ask for refund and find another skin. If there were containers to install as well then perhaps you need to check they are installed too, although that would bring up a totally different error.
Have you tried any other skins apart from that one?
Nina Meiers