Go here: https://www.warzone.com/MultiPlayer/PastGames
Change the Number per page to 100
Ctrl+F "You were booted"
You will find those 6 boots. If those boots are coming from games you never intended to join, go to https://bit.ly/random-invites
(and optionally, send a Bug Report reminding Fizzer that the UX of signing up for QM is bad and he should fix it because this issue happens ALL THE TIME
and even the engineers on the TI-84 would struggle to come up with something this asinine: https://warzone.com/ReportBug