Zoom auto renewed and I want a refund

Hi,

I needed Zoom pro last year but haven’t used it for ages. Just seen that it auto renewed and at a 50% price hike, but I didn’t get an email to check if I still wanted it, or warning of price hike. I believe there’s a 14 day cooling off period so I would like to cancel my subscription and to receive a full refund. How do I do this? I can only seem to talk to bots.

Thanks