If a 6 year old child is not listening and obeying their parents you need to put the 6 year old in timeout and if the 6 year old refuses to stay in timeout you need to spank them to get them to listen.
Spanking does work to get children to behave as they hate having their bottom spanked as it hurts and it's not child abuse when done correctly.
I was spanked with a belt as a child and I still love my parents and am glad they spanked me to make me behave.
Taking things away from the 6 year old child can also sometimes work but sometimes if the child really is not listening and disobeying the parents spanking is needed to get the child to listen and do what they are told to do.
You should never let the child do what they want because it makes the child know they they are in control and as they get older it will be harder to control them.
So let them know who is boss and spank them when needed.