Lounge suite is not quality sent it 3 times to fix

Hi there. I have been sending back the lounge suite for repairs and everytime it returns something else is wrong. It always takes them more than a month to return the couches. For example - they are sitting with the single couch since 24 December 2015 and it is still not returned today 18 February 2016. My feeling is that they don't know how to fix the problem as we have explained it 3 times now! ! Lappies is saying that it is the Service department delaying the process. I want a new lounge suite and they don't want to give it to me. I am tired of sending WhatsApp messages and not getting my couches back. Seems like it is a manufacturer issue but no one wants ti take responsibility.