Am I wrong?

My ex partner, father of my 3 children 11,10 & 8 is living in the family home, he pays £100 a week, that includes his contribution to the upkeep of the 3 children, rent (he has his own room) gas electric use of WiFi tv and all toiletries plus food, he doesn’t lift a finger around the house. He doesn’t help with clothing, hair cuts ect for the children everything is taken care of by me, he said he can’t afford more than £100 he only earns £382 a week after tax, he has no car and a monthly contract mobile phone. Is this acceptable ? What would you do?