Cannot Cancel Special Account

I am writing to you all to pay attention when signing up for Zoom business account through the sales department. We have had our zoom pro and phone account for over 2 years. We recently changed to a different platform and have been trying for TWO WEEKS to cancel our account. I have opened tickets and tried to escalate and called billing and called sales. After the initial year, our sales executive was never heard from again. Never heard from any sales account person from Zoom. Now, trying to cancel and cannot get anyone to follow through. Sales says needs to be renewal specialist. Renewal specialist says its billing. Billing says its sales. Terrible service. BE AWARE!