Lansinoh Wearable Double Breast Pump Suction Power Problem

I purchased a Lansinoh wearable double breast pump through Trendyol on July 26, 2025, and experienced a serious suction power issue. Specifically, one side of the device (right/left) hardly expresses any milk, while the other side functions normally. I reported this problem to customer service, and my product was sent for warranty service on October 16 and returned to me on October 22. However, only the container was replaced, and the main issue with suction power was not resolved. The problem persists, as the device itself seems to be faulty, and I still cannot pump efficiently. My invoice number is INT2025000011747. I do not accept such an inadequate solution from the brand and request a refund or replacement of the product.