You must write clear conditions before the deal, such as if the money was sent and the user is not connected, escrow will be released within 24 hours.
Acceptance by the user of these terms will force him to deal with you within a specified time limit or fast response from the localbitcoin team.
Mostly "if the user is new" after proving the payment, waiting about 72 hours and they will release your coins.
Hopefully the seller will come online soon.
![Sad](https://bitcointalk.org/Smileys/default/sad.gif)
I have the terms like "you need to release bitcoin as soon as possible I marked the payment" I hope this will be taken into consideration but LBC support team.