horrible mattress

Off gassed, smelled horrible for 3 weeks, could not use it, had to air out, then within 3 weeks hips and shoulders hurt and left impressions ..JCP , 5 months alter being notified sent someone to measure mattress! How it measures and how it sags when lying on it re like apples and oranges. Will never purchase from JCP or 5 star mattress again, mattress has to be rotated every 2-3 weeks and still hurts my hip, etc.. Springs can be felt around edges. This is terrible workmanship!