damaged goods, billing instructions and no warrant

I opened an account with house and home, told them that i wanted them to do a debt order because i dont like standing qeues, my items got deliveried by the durban branch, the couch i bought didnt want to fit, so they told me that they have to take the couch back and i must pick another one and again they will charge me for delivery cost, i told them that cant happen because ive already paid for it, so they just left the couch there, and i had to struggle by myself to make it fit, i had to go around asking for help from people to help me, luckily it got inside, only to find out that the one side of the couch arm rest is broken, and one ottoman didnt have a leg, fortunately they were able to fix the ottoman because the delivery guys saw it was broken, but with the couch they didnt beacuse the delivery guys were gone and i didnt say they must leave, and with that they had said they will bring other guys to come and help, but they never did, now im stuck paying almost R800 every month for 24 months for a broken couch, and with that they never do a debt order, they keep telling me i must go to the bank myself to authorise the debit order, WHAT IS THAT. I WILL NEVER RECOMMEND THAT SHOP.