Easy to Sign Up / Difficult to Cancel

I have used Zoom on a regular basis for my business and was pleased with its performance. However, when I sold my company, I did not cancel my subscription while my business address was still active. Once I remembered to cancel this subscription, I tried to log in using my old business email and was prompted to enter a code that was sent to my old email address. As I no longer had access to that email, I was unable to access the code nor the Zoom account. Zoom Support instructed me to send an email and I have been in an endless loop of replies and delays in trying to cancel my subscription. I understand that this can happen according to online chats, but Zoom refuses to resolve what is really a simple situation.