How do I go about getting a replacement chair seat. I just purchased a table set and only one chair seat is not right. I only need the seat.

I would call the company that made the chairs. They should be able to give you a replacment chair seat

Have you contacted the Customer service department?

Check to see who the manufacture is and go to them.

Contact Walmart customer service explain what happened. what you have and what you need and tell them you want it ASAP.

GO to customer service in the store.