お詫びとすぐに正しいサンダルを送ってくれるようです。
I apologize for this mistake. We were able to locate the other shoe, that was the last pair in our company. I will be sending out the replacement on Monday, I will let you know what is the best way to return the wrong shoe on Monday after I speak with the warehouse.
Please let me know if you have any questions and again my apologies.