Kurl-On — mattress 5x6, 6x6

Address:	400089
Website:	www.kurlon.com

I purchased two mattress in april 5x6 and 6x6, only in august i saw sagging on both mattresses... Both sagged 1.5 inch or so and as per replacement policy they were to replace the mattress if they have sagged 1.5 inch depression.

I am following up for last two months from august 22nd to ontober 16th.. Almost two months and not the team saying that dipression in mattress is just near 1.5 so we can not pass it and needs to be reinspected.

Which is totally unexpexted... Is this the quality?
Should i measure the dippression each month to cover this one year?