Unfortunately invitation links, even those sent via email, are not generated per user - we often have customers who want to send invites out to a whole team - so there is a risk that, if your remain logged into the wrong account, you will be able to accept the invite.
Our system will cancel your Pro and give you a pro-rated refund, so you should be able to simply leave the team, and restart your Pro subscription, and continue as you were before!
I’ll definitely pass your feedback on to the team, as I can see this is a frustrating. If you have any issues resolving this, feel free to let me know or drop us an email at [email protected] and the team will be happy to help!