It is currently impossible to unlink your bank account from the app. Should you wish to do so, please reach out to our Customer Support Team who will be more than happy to assist you with doing this.
The process to change your bank account requires that your initial bank account is unlinked, as above, please contact our Customer Support Team to assist you with this. Once your current bank account has been unlinked, you will be able to link your other bank account. Please remember that the bank account you link to your Shares app has to be in your name!