If you have accidentally sent an invoice to the wrong person, you can simply cancel the invoice, and the recipient will receive an email explaining the cancellation. This will mean that the payment link they initially received will no longer work and that any reminders you may have set for the invoice will also be removed.
However, it is important to note that whilst the invoice can be cancelled, the initial email they would have received containing a PDF of the invoice, as well as any information you attached to it, can’t be unsent. You should consider if the initial email may have contained any sensitive information that may have been meant for someone else.