4. What should I do if my new Dialog Connection seems to be having an active profile/registration in an external application?

If the new connection you purchased has an existing profile on a third-party solution such as Whatsapp/ Viber, you can make a request to the external services/solution providers that the same be deactivated.

Telecom operators are not in a position (and are not liable in any manner whatsoever) to perform the deactivation of profiles maintained by other parties, using the mobile number since they have no visibility or control of the same.