Reply to just got my Midi fighter but there has been a mix up!

i am a mixture of happy and mad just got my midi fighter now the proud owner of number 444 of 500 but my order is wrong! i ordered 4 red 6 white 6 black buttons and the diy options ( i was really looking forward to putting it together) but i got 7 white buttons 5 red and 4 black and it came already assembled, plus the certificate has my mom's name on it haha i should not complain she bought it cause it was my half christmas half birthday present. is it easy to take apart to change the buttons around?

Edit: just turned it on and all the leds are in the wrong place not a happy chappy