You pay it to them when you said you would?
Nc'd for this as don't want to out myself. Backstory - I regularly pay for things which a friend then pays me their half of. The amount varies each month so I typically email them (at their request, so they remember 
) with how much to transfer to my bank account.
Friend has a history of forgetting until reminded - I don't believe this is intentional or malicious in any, they are just not the best at remembering to do stuff. Or reading emails.
Anyway, last week payment day came and went with no transfer. So next day I politely texted and said, 'could you please send me this month's money'. No response. That evening I got a phone call and it transpired friend has a cash flow issue, understandable, could they pay me today instead? As a one off, that was fine, although I would have preferred advance warning. Friend has told me they set up the transfer yesterday on the phone to go to me today. All good. Except nothing in my account - now I know it's only late morning, but most bank transfers by faster payment arrive first thing in my experience. And I need the money because I've got things I need to pay for myself.
I've texted again and asked if they were given any indication of what time the transfer would be made. I'm thinking were they told, 'within 24 hours' or 'during business hours' today. I'm also worrything that something has gone wrong - my bank was doing maintenance to its website overnight. I got quite a nasty text back stating they didn't appreciate being hassled first thing in the morning and it was a sad indictment of my lack of trust in them, they told me the transfer would happen today and could I prove how much they owed me if that was my attitude.
AIBU to think that when someone has done you a favour that you might be a bit more apologetic if the payment hasn't been made, rather than having this attitude with the person you owe money to?
Sorry that was so long.