Mix a half cup of Dawn with a gallon or so of water and pour it on the hive opening. It’s a quick kill.

The hive is gone but now they are in other parts of the wall is that just soapy water? Should I spray it in the areas they enter?

Are the bees bothering you? If not, just leave them be.

They are aggressive and my kids got stung.

We had bees set up housekeeping in a wall (migrated in through a tiny crack under the eaves). We called in a bee guy - someone who specializes in bee/wasp removal and eradication. He vacuumed them out with some sort of vacuum machine and then sprayed inside the wall to kill any remaining.

Just had a small hole in the wall to repair.😑

This is a retaining wall, not a framed wall.

I would try Demon WP. Spray the wall, concentrating on any cracks where you think the bees are using as an entrance point. Then saturate the soil where you have dug out, then wetting the soil with more Demon as you back fill.

I'm having good success killing ants by treating ant hills between flagstones/ cracks in concrete by spraying just a bit of Demon WP. Works much better than Amdro. Demon residual action is about 30 days exterior use.

Demon suggests mixing double strength for killing bees.

If you know where the entrance is you could try Sevin dust. We had a yellowjacket nest in a small fescue grass plant. I could see the entrance and in the evening I poured some Sevin dust at the entrance. The bees enter and bring some of the dust with them that kills the rest of the nest. I had to apply twice but it did work.

You say they are BEES. Are they in fact bees, or are they hornets or yellowjackets or something else?

If they are honeybees, make a post on your local FB page for someone to come get them. In my area of the world, beekeepers will do it for free.