Is this a joke?
Your terms and conditions say “If you want to cancel your subscription, please mail your order ID to support@wpdownloadmanager.com or send an order note from your order details page.”
Which I DID 3 DAYS AGO!!! Do you want the copy of the email? Do you want a screenshot of your own terms and conditions?
Once again, cancel my subscription, revoke my licence and issue a refund, otherwise I will claim a chargeback. Doubt it will be very difficult since your whole auto-renew system and absence of “cancel a subscription” button looks like a scam.