please some moderator help m....this is my 3rd post now

2 days ago,a guy buys items from me,but payment is not seent to me,.it says payment undr review,now when i ask him…he says he created new account,.,it will take time to verify,so after 1 day it still showed under review payment…even after he said his verification done,so today i got message saying the sale been cancelled bcz u didnt deliver on time…cmon how could i deliver wheen u were verufying and it said under review,plus that i cant do anything now,cant click on anything.,.so thhhey banned but,wyyy ,what did i do,.,someone help,then thhey opened account,…but i got negative review…whhic i dont want for nothing,.pls hhelp