Royaloak Furniture — Wrong product received and not replacing the order products

Address:

Kachohalli cross magadi main road banglore

Hi I had visited the Royaloak furniture showroom located at Kachohalli cross magadi main road bangalore and orders the computer chair by physical seeing the model and price tag on it and took a photo of the chair
Later sales person said they will deliver the product to my address and they had deliver the different chair and when we asked them to replace with ordered one they are asking for extra amount.