i uploaded a mockup and they rejected it and sent me here to take ur feedback
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.
how do i know the quality they 'd accept ?
Please show preview images here, otherwise it’s hard to say what might be wrong.
Is that the only perspective or are there others?
That’s probably where to start.
Most mock ups will offer various layouts, perspectives, options etc to add premium value