Beko Prosmart Inverter 10 kg Does Not Function as Advertised

I just got a new washing machine, and it's a Beko Prosmart Inverter 10 kg, which is supposed to be able to hold 10 kg of laundry. However, despite only having 1 kilogram of dirty laundry in the machine, pressing the button for extra water, and using an excessive amount of detergent, the machine does not use an adequate amount of water, does not produce suds, and does not leave my clothes smelling clean. It's a world apart from our Bosch machine that's been around for twenty years. This circumstance is a major source of frustration.