You are far too soft. I hope you start now with making them do their own laundry. There should be a cooking rota for family meals. Why should it all fall to you? By 15 mine were making family dinners, they often did it together for company in the kitchen. I had a washing up rota as a child from 10 years old.
You are doing them no favours. Dishwasher or washing up, bin emptying on set days, laundry on set days so they have access to the washing machine etc. When we bring shopping in the children have always helped unpack it and put it away.
You need to sit down at the table with them and tell them you are not doing everything going forward so everyone needs to start taking responsibility for themselves and that includes rotas. Decide now how you want to do this going forward.
And no payment for chores either. Firstly, there is no choice, they don't get to decide not to do it. Secondly, no one is paying you to do chores. It gets harder when they earn their own money and pay for their phones but I assume they use your wifi. Google your router to see if you can access individual devices, that way you can cut them off but still leave your device connected.
When our children were little no one was allowed to leave the kitchen until all dinner stuff was in the dishwasher or hand washed, table wiped down and dried. Primary aged children can dry a pan and put it away. That way they understood what went into the whole process of planning meals; we sat down with them and they told us what their favourite foods were, we planned meals, made the shopping list and then we often took them shopping, one parent, one child to buy everything on the list.
Both my sons have lived away at uni, cooked from scratch, have clean and tidy rooms both at uni and at home mainly because we did daily tidying and I stood over them. My Mum was the same with us growing up.