Leather couches fading only after 3 years

My sister and i bought leather couches in May 2012 for R15.999.00 & of late they have been truning a greyish colour and are peeling off from underneath. We have been to the store to most of this year to advise however they keep on saying we should stop utilizing detergent on the couches even after we advised that we are using plain water to clean them. We were recently told to take pictures and send to the store of which we did however no one bothered to revert back to us to date. I called again this morning , after a month i have been with no feedback ,only to be told that they will not send someone to assess or replace the couches as we have had them for more than one year. It hurts to save up your hard earned money with the thought that you are buying quality however you are taken for a ride and when you raise your concerns all you get is a bad attitude and no help. I am being blamed as a consumer however the value of something should determine the quality of it as well and genuine leather in my world should atleast last a minimum of 10 years. Please help as i dont know of the next action to take as i feel i am not getting my money's worth. # Frustrated