I don’t have to make an Obamacare payment - auto-pay or otherwise.
What I would do:
1. Try to cancel Obamacare auto-pay. (One hour max.)
If that doesn’t work:
2. Have my bank reject Obamacare charges.
If that doesn’t work:
3. Cancel the bank account and go through the hassle of switching over the rest of my auto-pay accounts.
Finally, someone I agree with in this thread. And you said it better than I did. A reasonable stepped approach.