i have created the sandbox by using my jive community email address i.e firstname.lastname@example.org and got the https://sandbox.jiveon.com/ instance but i don't have Admin privileges on this instance, for my development activities I need to have Admin privileges.
please any help on this.
For the intended purposes of building add-ons and Jive apps, you do not need admin privileges on the sandbox. As its a shared environment I don't think Jive will be able to accommodate you.
So you'll either need to setup or get a private environment, or maybe you can explain why you think you require admin access?