In the Google Ads---> Manage tab of your Kliken dashboard, you can add/update by first clicking the campaign(s) you wish to update. This will bring you to the Edit Campaign Page.
To Add/update phone number:
There is a dedicated Phone number section, clicking on this will make a new menu appear that will allow you to choose the correct Country code for the number, add in the phone number information, and designate if it is a mobile number. Save your changes and the number will begin to appear when your Ad is shown.