Sleepwell — Sleep well Durafirm Spine care mattress purchased from M/S B S Traders Alambagh Lucknow

I have purchased above mentioned mattress from M/S B S Traders Alambagh Lucknow on 13.08.2014 through Invoice no 07/349, whose size was 2261×1930×115 and Serial no was 19382147.
That mattress is not comfortable and creating problem/pain in back since the day we purchased. For this I have made an Online complaint on 19.07.2015 (Complaint No was 3519 dated 19.07.2015 )
Now I request you to please repurchase that mattress and I will purchase another hard mattress of the size given above, which will reduce/stop back pain . Now I am Senior Citizen and facing problem, when we use the mattress, purchased from your dealer.i