Warranty is not backed!

I have personally loved my bed for the past 5 years. I have to have firm for my back. Unfortunately the airbags/ bladder as Tempur-Pedic refers to them no longer stays inflated and they said it isn’t cost affective to repair because they just end up with the same issues. Tempur-Pedic stated originally they would provide me credit towards what I paid even though their warranty states comparable product or pay the difference to upgrade. Their comparable to offer is the adapt none pro medium or medium hybrid. For weeks I was unable to even find a retailer that carried these to try out. Bed mart told me they don’t carry these two because they don’t give to the true Tempur-Pedic brand. I am unable to speak to a manager. I need a firm bed. Only comparable from what I tried was the pro adapt firm. Which is still a disappointment in profile size to what I currently have. Choice luxe is 14 inches. Tempur-Pedic does not back their warranty. The medium or medium hybrid don’t even have the zip off cover.