Cost Less Mattress & Furniture

I purchased a mattress from cost less furniture, we had gone into the store and picked out the mattress we wanted, we then told ninfa what mattress we would like, she wrote up the paper work as we walked around looking at the other furniture. We signed and payed for the mattress assuming it was the correct mattress she had written on the paper . we got our mattress delivered on 6/19/15 we realized it was the wrong mattress, we gave her a call Monday on 6/22/15 explaining this was not the mattress we had picked out. She continued to argue and say it was, I went down to the store and the mattress we picked out was in fact completely different, the mattress wasn't even in the spot we were at and she told us they move the store around a lot so obviously she couldve made a mistake. I even asked her to check the cameras so she could see what mattress it was however she said she didn't have cameras. She said it would cost us a $150.00 restocking fee to return the mattress and get the refund and then told us if we wanted the mattress that we had originally picked out that it would be $250.00 more after we had already paid $500 for the mattress. I asked to speak to the owner and she said I couldn't and then she stated she wasn't the owner, I called the very next day she would not call me back, I called her numerous times Tuesday and then Wednesday she finally called me back saying she is unwilling to even return the mattress or give us a refund. She told me that she doesn't make mistakes and then proceeded to hang up on me. This is not the mattress we picked out. We assumed she would've wrote down the correct one but she honestly didn't and now she's refusing to even give me a refund, to give me the right mattress or to do anything to make this situation correct. Shes literally given us the wrong product and neglecting us just so she can keep the money. She's also sharing our personal information on yelp, & pretending not to be the manager. Very dishonest company!