why my iphone say you dont have accesss ask for administrator to give you access

Without any details, it sounds like your iPhone is remotely controlled (MDM - MobileDeviceManagement) by a company/school/institute. Should be this case, you need to contact the IT admin/supervisor and ask them for help, if you're eligible.

If you mean something different, please specify your needs better.

Thanks and regards

Giulio

Is your phone managed by your work or school? If so, you need to contact them for help.