I did 1 & 2 to no avail and see no way to do #3 because I see no way to cancel a connection through the Bot Store. I can delete Contacts, but STEEM is not among them. So, I created a new wallet. After failing to transfer to the new wallet, I'll make a new request: FT7MZT5K7AOID5V34GTZVCI5F6DBHL45
Don't worry, this will all go to a good cause. I'm already earning very small amounts from running World Community Grid (https://www.worldcommunitygrid.org/), which I plan to donate to the https://gridcoin.ch fountain.
Update: My new wallet is already connected to the STEEM Attestation bot. It may be a default now.