i have change wifi provider which also gave me email addess that was used for subscriptions how do i change this email as i cannot access the email now

To change the email address that you use as your Apple ID, see the instructions in: Change your Apple ID - Apple Support

and be sure to note the following from that link:

Before you change your Apple ID

Sign out of all Apple services and devices that use your Apple ID. If you want to use your iPhone, iPad, or iPod touch to change your Apple ID, stay signed in with your Apple ID on only that device.