I want a refund

I purchased 2 x 2 seaters less than a year ago. Let's call these couchers A and B to understand my frustration.

The series of events are as follows -

- we heard a huge bang from couch A and figured that the bottom beam of the couch split and called the warehouse soonest.

- couch A got picked up after lots of false appointments and phone calls fighting about it

- during the time of couch A being so called repaired we started feeling couch B to sink.

- called warehouse explaining what we experiencing and I planned that they fetch couch B and drop off couch A which was not rocket science and I expected this to come from them

- finally the change was done.

- weeks went by and couch A started to do the same thing. Sink!

- being ****ed off I called carnival mall Rochester asking for a refund and I was told this is not possible. So I requested please change the couchs but still nothing they could do.

- I complained on Facebook and all was done a complaint loaded which anyone can do. Being doing this for the last 2 months

- they dropped off couch B and fetched couch A again on another day. Apparently when Facebook department loaded the complained they did not arrange for pick up also. I should of just complained my self to save the time.

- guess What???? Today 16/10/17 we notice couch B started to sink again on one side!!!! And when sitting on the other you can feel a hard wood object holding the second side??

What now? Really?? I can not believe a company like this sells this kind of quality? Is there quality checks??

Will we ever have this fixed? How much is enough?