IKEA's Bad Customer Service and Replacement of Defective Products

I bought two triple sofas with totebo light beige covers from the IKEA online store in October 2021. I live by myself and don't have any pets. During the week, I work. I spend most of my time outside and not much time at home on the weekends. Despite this, both of my couches started to shed a lot. In April 2022, I called customer service to ask for new covers. In June 2022, I got new covers that were the same color as the old ones. But eight or nine months later, in February 2023, I had to call customer service again because the covers were broken. They told me I could exchange the covers with Yurtici Kargo, but the courier wouldn't do it because Yurtici Kargo doesn't work with IKEA. I asked customer service for a replacement cover in a different color (hallarp gray), but they said I would have to go to the IKEA store myself because they couldn't do it. After many failed attempts to solve the problem, I took my covers to the IKEA store in Ümraniye, where I had to wait for about two hours. But they didn't have the cover I asked for, so they told me to either wait two months or go to the branch in Bayrampaşa to buy a new one. Also, even though the cover was broken, I would have to pay the difference in price. I tried to get help from IKEA's online store and the store in Bayrampaşa, but they told me they couldn't. I didn't understand why I had to keep using a broken product for a long time when the product was in stock but not in the Ümraniye store. I am very unhappy with IKEA's customer service and quality control after what happened to me.