Fakir Mr. Chef Quadro Violet Kitchen Robot Blender Set Return Request

Hello, I purchased the Fakir Mr. Chef Quadro Violet Kitchen Robot Blender Set through Hepsiburada. I believe it arrived on November 30, 2023, and I haven't been able to use it yet. Initially, the blender broke down after making soup three times. I had to go through the process of sending it for service and waiting, etc. Even after that, they told me that it couldn't be run continuously; I had to stop and restart it frequently.
When I finally got it back, I couldn't chop onions with the food processor. They told me to send it for service again. I was able to go there yesterday, and the dealer advised me to first do a brief pulse, then do a 5-10 second pulse, and then use it. He demonstrated by chopping potatoes, adding small pieces at a time. I will try to use it, but I did not find this information in the user manual. If I am mistaken, please send me the relevant part of the manual; otherwise, please accept the return of your appliance and refund me my money with legal interest.