Loss of power due to empty battery / uphill driving / acceleration / overtaking

[firewall76]

hello, my father purchased a MG ZS+ in February 2025. He got some problems: Loss of power due to empty battery. He went to the car seller, but he was told everything is ok and no update is required. Some flash drives don't work correctly (the songs stop, the system crash and reboot),other have no problems. Sometimes the steering wheel, just after star the engine , moves: my father was told it's depending on the wheels if parked straight no movement otherwise the car tries to make the wheels stay. But it is not like this. Someone could help me? Thank you