Very bad customer service from Russels

My daughter bought me a christmas gift Benifica Recliner lounge set from Russells Somerset west in 2023 with loan credit *** which she settled in 2025 already. She also took a extended warrenty on it. Since day 1 of purchase we have had endless problems with the reclyners. Russells made +-10 exchanges in the 3 years and every time its a default set or the recliner only last for 3 months. I went back and forth with having to stay out of work for exchanges to be delivered just to find it is faulty set. Poor delivery guys is already aware as everytime i tell them take out the recliner first and than once again its faulty. For almost 4 months now i am again waiting for another non faulty set to be delivered bas all sets was faulty once again. I went to the store requested my money back or just to exchange with another decent set different model/ manufacturer as clearly Benifica Recliner lounge set is a manufacturer faulty set as +-10 exchanges and does not last. Clearly they dont care as they said if i want a different model i need to pay in the difference to the other set. This is ridiculous after 3 years of struggels and i must pay in. They clearly don't care about keeping their clients happy. Why must i pay in on clearly a manufacturer problematic set , its not like i have not tried to accommodate Russels by rushing home from work or taking off from work to wait on a delivery that is also faulty. +- 10 exchanges. Please advise what can i do as i am now utterly and very unhappy as for 3 years i have had no joy out of my gift . Russels was happy to accept my childs money but they cannot rectify their problem . Clearly the sets is not checked at the warehouse before leaving . I feel that for 3 years of trouble and suffering why must i pay in ad what happens if my warrenty expires now