Lewis Fochville/Customer Care and Area Manager POOR after sale service

We are pensioners and bought a couch set in April 2018. Since October 2018 up to date we keep on sending it back for repairs - brand new items?? We require that we get a replacement couch set or our money back. We are elderly people who are being are not getting the after sale service as advertised. We have spoken to their customer services how many times, every time they say they will come back to us..... we have spoken to the branch manager how many times, we have spoken to the person at the branch handling the complaints.... we have even spoken to the area manager herself.... still "we are waiting for the merchandize manager" next month the warrantee / guarantee expires and what then?? We require assistance please, money back or a replacement set.