Several local (but national chain brand) furniture stores.

So many reasons. One had better quality furniture on display than what they sold by a long way. Another tried to give me not one but two firm mattresses instead of medium and lie to me about them. Yet another got caught out blatantly lieing to my face about delivery times and procedures.

All of them had great customer service right until the point that they had our money and then completely treated us like garbage afterwards.