Real Enlight case comes with either Enlight PS or no PS,
they've different part number.
Check the part number,
if you paid for the one which supposed to come with Enlight PS but you got other brand PS, you've been ripped, unless it's a better PS.
My friend once bought an Enlight case from Mwave and got no brand PS in it. I don't trust any small online vendor for buying Enlight case anymore. I only buy Enlight case from egghead/buycom/onvia such places which use the supplier to ship the product out directly. They won't swap the PS or put no brand PS into the without PS model and sell it as with PS model.