Urchin Design places design locks on websites. no-one else can work o them

We have recently requested Urchin design update the contact details for various companies, one being Retrosol which we have hosted with Urchin since 2015. He has refused citing personality issues, he simply does not wish to work wit me because I'm demanding. I have requested 5 other companies make the changes, but he has installed complex firewalls & they can not assist. let week I requested he release the coding blocks and he simply laughed & put down the phone,