Defective, previously used couch sold as new-Rochester Furniture Eastgate Mall

We purchased an L-shape couch from Rochester furniture at Eastgate mall. On 14 February it was delivered to our house, On 19 February, we noticed hidden stains that were not visible at first glance. Upon closer inspection on 20 February, it became clear the couch was not new- it appeared to be a returned or display model, with stains as it looked like it was washed before. On Friday I immediately contacted our salesperson, Pablo, who initially agreed to a refund. However, he later backtracked via whatsapp, stating they would only refund if the stains are not “visible” and required an inspection. Him and the driver came on Sunday, inspected the couch, and then claimed they needed to “ follow process”because we had it for four days implying we may have caused the damage. We are not satisfied with this treatment. The item was misrepresented at point of sale, & we are now left with a used, damaged product. We have photographic evidence of the condition and correspondence with the salesperson. We want a full refund and will return the couch to the store on Monday. We expect this to be handled promptly and without further delay.