We are sorry that there may be no direct way to change your email address and sync the account data to another new one.
However, you can use OPML export and import features to import your subscribed podcasts to your new account which you can create right away. We can help you delete your old account after that or you could delete account
on your side.
Please make use you back up the subscriptions data first.
Here is the instruction regarding this procedure:
1) Log in your current account, go to the app Settings - OPML export, export the file including your subscriptions info;
2) remember the location of this .xml file and keep it;
3) Log out (on the bottom of the app Settings page) this account and Log in your new account with a new email address, go to the app Settings - OPML import and import this file. Thus all of your subscriptions will be there.