Not delivered yet
Message the seller from the order page immediately and give them the correct ID. They have not done the work yet, so there is a real chance of fixing it. Do it now — this window closes the moment they deliver.
Already delivered
The top-up is in whichever account you named. The order shows what you sent and what the seller delivered, and the two match — so the seller did their job and this is not a refundable failure.
The game publisher is the only party who could move it, and they do not transfer credits between accounts. If the ID belongs to someone you know, ask them.
Next time, copy your UID from the game rather than typing it, and read it back against the checkout form before you pay.