Your situation is as follows:
1. You enter Viber from an unknown user and start a conversation. Then share the number
2. When you share the number, the contact is found by the phone number and linked to the old contact
https://mtvnetwork.1b.app/app/contact/157/ Viber from which you are writing
3. If the contact is not found, the phone number will be added to the current one.
4. You most likely did not succeed with different numbers, because they were all in the box database
In theory, it is possible to make a setting so that if the user in the box is already found by number, the card to which Viber is tied can be deleted and the customer of the order is assigned the user found by phone number. Takes 2 hours