Wasps are territorial but not too bright.

Get a brown paper bag larger than the nest they have built or are building, stuff or inflate it, twist the top tightly and hang it near the nest.

If they think there is a larger colony nearby they will literally buzz off.

It's free and perfectly harmless to the environment. Give it a shot.

Hang the bags everywhere you think the wasps might consider homey before they make themselves too comfortable.