Why can't I change my subscription level?

Hi TTO, 

If you received an automated response, your email is likely still in the queue, and you will get a reply as the email queues are high.

Since you have a perpetual license, one option is to cancel your subscription and use your file offline. You will lose most of the online functions like STP, Superannuation, and bank feeds, but you won't need to pay any monthly fees. this is good if you won't be using these services because you've already sold the business and just need the information for future reference. 

Regards,
Genreve