they do not have customer best interest

I have purchased couches last year around november, recently i noticed that the color is fading away and also some parts has teared off, we compliled via a sales person and yesterday they come to collect particular once only to find out that the othe parts tired off also we could not see because it was under. we requested to change the color as we noticed that tha color is fading away we were told they do not exchange if it was after 7 days, there was no way we could see the color is fading in 7days.