Rochester - Brilliant Pre-Sales / Nightmare After-Sales

I purchased and took delivery of my couch set two weeks ago (October 2019). My three seater recliner is broken and this was reported immediately to The JD Group as per the instructions received on how to report this problem. I received a call within 48 hours after reporting the issue and arrangements were made for the following Monday for someone to be sent to my home to assess the product, and either repair or replace. I arranged that someone be at my house the whole day to wait for Rochester to arrive - they did not. I tried and failed to speak to anyone regarding this. I then received a call on the Thursday after the Monday to apologise and promised me that someone would be there that day. I rushed home and arranged that someone was available to receive them, this time. Noone arrived. It is now the following week. I cannot get hold of anyone telephonically. Emails go unanswered. I financed my furniture through The JD Group and I have no doubt that when the time comes to collect the first debit order, they will not hesitate to take it. And if I do not make that first payment - I have no doubt that they will remember my number and phone me very quickly. What to do, What to do..........?