Have you checked that the invoice number you have used is not a duplicate?
If it’s not, then the best solution to getting paid is to issue a credit for the previous invoice, then put in a new invoice with a new invoice number.
Alternatively, be awkward, but don’t complain about not being paid.
If it’s not, then the best solution to getting paid is to issue a credit for the previous invoice, then put in a new invoice with a new invoice number.
Alternatively, be awkward, but don’t complain about not being paid.
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