I ended my business couple of months ago. I have been paying for the pro version of QF however because I have not longer have a business I stop using it. However, after this time I have to log in and check some data but QF is making me pay over £50 for a pro version - which I don’t need.
It sounds like the accounts are still within the L/XL tiers, which requires a Power User Subscription. As the accounts are no longer used, it’s likely they will eventually drop down into the free tiers.
But let me send you a private message and get some account details from you, and we can take a look at this for you.