Thank you for your reply.
200,000?! Wow! I thought 3000-4000 across 5 days was too much.
Emails finally stopped today! Yes, everything was in the queue as I have tested it by changing the target emails on the form or even disabling the contact forms all together. Couldn't stop the ZAP because it become unresponsive and had to force quit it.
It was a pain however lesson learned. Next time I'm changing emails before the test.
All the best