Auction Script Bug Fixes

I have an auction script that has a buy now function that’s only available for 24 hours after the auction ends. a modification was done to the script and now a few functions aren’t working correctly. I need this to be fixed so that: the winner of the auction can’t use buy now If you bid on auction and lose, you can use the buy now but only once and a discount is applied [ the discount is working ] the correct buy now price needs to show on the bid button this is an urgent job and has to be done within the next few hours today thanks