IKEA Forces Me to Handle Color Defect on My Chaise Lounge by Myself

I bought two Kivik model sofas from the IKEA website, along with a chaise lounge to go with them. I assembled the products myself, and afterward, I noticed a color tone difference on the chaise lounge. I called IKEA customer service, explained the situation, and sent photos via email. They sent an inspector to my home, who confirmed that there was indeed a tone difference. As a solution to this issue, IKEA told me to dismantle the sofa, remove the covers, bring them to the Bayrampaşa IKEA store, pick up a new one, take it home, and assemble it again. If that were the case, I could have already returned the product without waiting for an inspector or getting their approval. What kind of support did they actually provide me in this situation? On the phone, I specifically asked them to send a service team to handle the dismantling and reassembly so that my inconvenience would be resolved. Why should I have to dedicate an entire day to fix a problem caused by their mistake? If they acknowledge an error, why are they placing the burden of correcting it on me?