Sandbox Bonus Tools purchase and installation


I’ve tried to install this extension made by Cadman. When purchasing this, I received an error message saying there was an issue. The transaction debited my bank account however I didn’t receive any confirmation email from Trimble. Support has directed me to Cadman as the author even though payment is via Trimble to resolve (case 10239356) however I have no contact details for the plugin author. Can anyone help?