Did you make sure that in the description of the version you choose gave mention that it will come with an power supply? (as I thought all of them did of the pre-builts)
If not I suggest checking that first and if it did have that in the description get in contact with them and say that it was missing from what you received.
Upscale/FPS increase request topic , Video resolution mega poll , Tag poll and recommended multi-axis script along with single-axis script which is a Fap Hero.