@rhc @ian_roberts thank you for your replies. I think I might be best re-explaining just incase im conusing people, probably one of those situations wher eI know what I mean but havent explained very well lol.
So there are 2 suppliers - A and B. Both invoiced me for payments in January. Supplier As invoice was due on 14th and Supplier Bs invoice was due on 30th.
Both invoices were for the same amount and frustraitingly both suppliers have very similar names.
I paid supplier As invoice on the 14th but tagged the payment to supplier B (I use the bank feed and both invoices showed but I tagged the wrong one)
on the 30th it looked as though supplier As invoice was still to be paid so I made another payment
2 payments to supplier A for only one invoice and none to Supplier B
Supplier B then brought this to my attention today and I paid him the money due and requested that supplier A returned the second payment
So essentially 3 payments have been made but there are only 2 invoices.
there is now a payment sitting in limbo waiting to be tagged with (hopefully) a refund of the same amount coming soon
I am unsure what to do with the untagged payment as there is no invoice for it and also the refund when it comes.
sorry if this is what you and @FaradayKeynes have already answered