something triggered me to ask this question, As a new trader As I am, we know very well that binance is no longer in Nigeria any more. some weeks ago I paid for particular coin and the seller refused to release the coin to me, the next thing he do. He went Off line for about 3 hours before coming on line again,at the end of the day he released the coin to me after 3 hours. because binance security was so secured, if the person doesn't want to release the coin.you can quickly go to appeal and everything will be settled, after giving them the screenshot of your payment receipt.
I had a reply for you, not until i read to the end and discovered you've already answered yourself, left for me i think your choice of topic contradicts your content cause in the end the seller later released the coin like you stated. Well I've experienced something similar and in my own case the seller was having a network issue so couldn't release on time. I was supposed to launch an appeal for time wastage but he chatted me with some reasons which is understandable.
But in a case where the seller goes totally off and refused to release for 24 hours or more than, the next action to take is to launch an appeal, with the necessary requirements for prove like you've stated already.