I've never purchased from this company so I can't comment on them. However, I have purchased from other fast fashion companies during my younger years.
Still, boycotting fast fashion is not attainable for me at the moment. Those are the only stores available in my neck of the woods. There are thrift stores near by.......but, I can't get over the fear of possibly buying haunted second hand items. I guess that the chapter "The White Satin Evening Dress" from Scary Stories to Tell in the Dark really affected me as a a child. Hahaha.
I do try to find other ways to limit my carbon footprint. For starters, I only buy clothes when I need to replace one already in my closet. Even then, I only get rid of clothing that I can't fix, mend, or use as "play-clothes". I live in an extremely hot environment and sweat easily, so most of my shirts and blouses are made out of cotton fabric. I know that this isn't the best material, but at least it's biodegradable.
I'm broke, so I regularly purchase my wardrobe from clothing discount stores like Ross, Marshals, and Burlington's Coat Factory. Although these stores are a mixed bag, it gives me the option to be careful and picky about my purchases.