This is the point where you send a letter to the company, stating both the situation and the remedy you want (e.g. refund of payments for inaccessible services,

This is the point where you send a letter to the company, stating both the situation and the remedy you want (e.g. refund of payments for inaccessible services, cancellation of the account, maybe a reasonably small amount as compensation for damages). In that letter, you set a reasonable deadline. If they don't respond within that deadline, you take them to a small-claims court. I understand that us tech bros want to fix everything online, but sadly that doesn't always work. But that's not the end of all your options.