To remove a Google account, go to accounts in the settings menu. Add a new Google account with your current email address. Then open the Play Store and look for your email there with a down arrow. Select the new email from the drop-down list.
Unfortunately, there is no way to physically transfer apps from one Google account to another. Even if you raise the issue with Google, they will not be able to assist you. You can, however, add the old account to your Android device and install any of the applications on both accounts.
Go to Settings. On your phone, tap the menu button or the menu icon in the upper left corner (the “hamburger” menu), and then pick Settings from the menu. You’ll see a variety of options that you can choose, as well as information about the Google Play app version you’re using on your device.
Open the Settings app on your phone. Tap Accounts. If you don’t see “Accounts,” tap Users & accounts. Select the account you want to delete by tapping it. Delete the account by using the provided options. To ensure security, if this is the phone’s only Google Account, you’ll need to enter your phone’s pattern, PIN?
It isn’t currently possible to combine multiple Google Accounts. If you’d like to move your data from one account to another, you can do it on a per-product basis. Alternatively, if you want to start using a new product, there’s no need to create a new Google Account.