Sinking Sealy celebration from dial a bed

I purchased a Sealy celebration bed online in November, the bed in a bad state, a portion of this bed is sinking, and I called to exchange it and Jeanet told me the supplier will call me within seven days, I sent her email to say the supplier hasn't called she now says the supplier has done inspection on images, I don't think that's on, I told her I didn't believe her, she said she's going speak to the supplier and it is now two weeks and we are sinking