Maximus Primal

I've verified my game serial number many times, it's corrected entered into both my profile and when it asks for it apon update. However, it says it's wrong therefor can't update my game.. The only thing I can think of is that it already has a serial number for my DA in my profile but I don't remember entering one. Is there another site I could download the patch from? I have

Mine was on the back of the CD case on a sticker but the fraking serial number is the wrong one according to the website (yes I've checked it five times already)