Damaged goods

I bought lounge suite at UFO in 2015 December and was told it’s half leather the whole is 100% learther and the is not really leather but with 4 months the lounge started to crack on the part where I was told it’s 100% leather went to store to complain and the come to collect on the 2016-05-20 and give me a new suite on the 2016-07-25 and within 6month same problem started again then look for second opinion to confirm if this was a really leather or not and to my surprise it was not that why it was cracking so I went the store on 2018-01-04 to complain that what the sold to me was what they said it was so said will forward the complain to heard office then heard office back to saying the suite will repair and I must pay for deliver MY PROBLEM NOW IS WHAT IF THE SAME PROBLEM HAPPEND AGAIN. I WANT UFO TO GIVE ME OPTION TO GET DIFFERENT LIUNG SUITE OR FULLY REFUND ME AS I DONT WANT TO DO THIS AGAIN. And when I complain to the store about paying anything Nathi told me he can’t do anything the decision was made at the heard office I must accept and told him to give me bank details to transfer the money then after I think about it I sent an email to tell them I don’t this lounge suite anymore