Insulation - what can I do about plastic beads all over my garden?

My lovely neighbour recently got her insulation, solar and all that done. I'm delighted for her, she's got health issues, retiree, all good news.

Day one of the crew preparing the insulation, the old stuff blows out through my internal and external air bricks. I get here in time and stuff spare stuff in them. Disaster averted.

They come back to sort it, and I'm less quick off the spot. Our bedroom gets covered in whatever has been inside my neighbour and my shared wall innards for almost 100 years.

The lads are nice and clean it up and pay me £20 for the electric for the multiple washes we needed to do. (I'm fairly sure this ruins any legal complaints I could have - if so, please just tell me so)

I come back from work after they've finished spraying the new polymer beads in the walls. Meant to be great stuff this insulation, won't rot like the old stuff my neighbour had that is now crumbling to dust across the UK.

However, with the internal air bricks still stuffed, I'm out weeding this morning and find hundreds of the plastic beads in my garden. I've brushed them into the stone beds against the house. I'll be digging them up if I'm in this house another 100 years.

I've got videos of the beads.

What can I do?