In simple answer, NO. We cannot take money out from your Synced bank account under ANY circumstances.
Bank Synced Account are purely allowed READ ONLY access to your spending transactions in order to allocate INCNT reward to you, so there is no loyalty card to scan. These accounts are NOT used for charging purposes.
You need to consciously nominate the payment source from the setting menu in order for us to process payment. Please also view the answer of the FAQ " What is the Subscription Fee?"