Check that your payment completed and that the subscription has not expired. A receipt or store purchase record is more useful than a pending bank entry for confirming the order.
For a store purchase, check the purchasing store account and use Settings → Restore Purchases. For a web purchase, sign in with the account associated with your order.
If PRO is available on one device but missing on another, check that both use the same Chatbot account and sign-in method.
If the issue continues, send support your User ID, order ID or receipt, purchase date and a screenshot of the missing access.