Disappointing quality from House & Home

I bought a couch from House & Home in 2016, four months later all the cushions had come apart at the seems. After a month of debate the cushion covers were replaced and I was told that they knew about the fault and that the new covers would not come apart easily. Eleven months after they were replaced I saw that one had come undone again. I contacted them again replying to the same chain of emails from before so they had all the information about the case. I told them that now the couch frame was also coming undone. After a week and a half of back and forth emails I was told that the couch is no longer under warranty and that they will not take further responsibility. I think that it is not very good of them to sell a faulty product and that I was done in. A couch should last many more years. I do not even have kids or pets to damage my furniture. This is unacceptable and I will no longer support them. I also bought a microwave for my mother-in-law and that blew after 3 months. Very disappointing .