Unfortunately we found it isn't at the quality standard required

Hi
my item was rejected, and i don’t know why or what to do to be accepted, i have spent so many hours with it to make it as good as possible, can you please tell my what to do, and how can i submit it again?

Thank you for your submission. We have completed our review of “Karenderia GOODCOM Printer modules” and unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again.