Carpet and Decor Centre bad after sale service

I had laminate flooring installed throughout my house a few years ago and was told this had a 15 year warranty. The first time the flooring had problems, they came and replaced the damaged floor. 5 years down the line, the skirting boards are falling off in places (laminate used) and there are a number of wood tiles now either bubbling or cracking. I have contacted them and am being pushed from pillar to post with no assistance. This has been going on for 3 weeks now and no joy from them at all.