Poor service from Dial-a-bedo

I bought a King Koil Akira bedset from the Umhlanga branch. It was said to be a firm mattress, but both my wife and I are experiencing sore backs when waking up in the morning. I weigh 90 Kg and my wife 60 Kg. I visited another branch and the sales lady advised me to exchange the mattress as it could be a dud. I complaint to the Umhlanga branch and the sales lady (Angel) arranged to have it exchanged. . The second mattress was delivered and the mattress behaved the same, not immediately, but after a month or two. I complaint and my complaint was sent to King Koil after days (I believe this is done for the 100 days to expire) and I received a call from a very professional lady who has been trained well to ask very leading questions. Watch out, apparently a sore back / body is very similar to a lack of comfort! They don't exchange a mattress if you are just uncomfortable. The mattress is deemed bad only when their is a 4 cm indentation when one put a broomstick across the mattress! The person (Vikash) now dealing with the complaint keeps on with delaying tactics for us to come to a conclusion. I