I'm currently in same situation. I communicated with Buyer if he/she would be able to review within 24hrs. And buyer accepted. I delivered within an hour now it's over 24hrs, and no single response from buyer both on message and order page. it's currently showing late but not on the order page. I hope this does not affect my seller account in anyway? I've dropped countless messages to buyer but to no avail. I don't want to extend deliver date as buyer is not even responding to confirm if he/she is available.
Also, can i go offline/Un-available at this time as an order is active on my profile? I communicated all of these with the buyer and the buyer accepted. Now i'm in a very tight corner.