MattressDirect Rip off by selling bad quality Mattress and bad customer service Ridgeland Mississippi

I purchase a mattress set that cost me $19,24.93 from MattressDirect on 920 East County Line RD. Ste B.  after they delivered my product to my home, I find out there is damaged to my product.  The next day I return to the store ask for refund or exchange,  The sale representive refuse to do a refund or exchange even though I never used mattress. I even taken photo of damage part, they still won't refund or exchange for my products, after few minute conversation with sale representive, he even kick me out the store and threaten me to call police if I am not leaving the store, that is how they treat customer!