Babysitting and housekeeper for Greek family of 3

We are a family of 3 kids from 6 to 11 looking for someone who could be both housekeeper and helping with school and kids activities commute. We are based in W8. Fluent in Greek a plus. The mother will be also at home. Occasional evening babysitting possible on request. Total hours per week to discuss : it should be no less than 20 hours and could go up depending on availability. salary to discuss depending on total number of hours. Many thanks.