You have no contract with them - you do have one with Novatech, and you must address the problem with them.
This is a question of numbers. If the board on their site is clearly stated to be MSI KT6-DELTA FISR, but the illustration shows a KT6 DELTA FI2R you have a case. You relied on the image when making your decision to purchase.
Non of this may be necessary because you haven't yet done the one thing you must do - contact the company from which you bought the item, and tell them all about the problem.