Halsgran you have probably sorted the problem now, but I have a very old M.R. breadmaker. I've found if I switch it off at the plug if I make a mistake it reverts to the mistaken programme.
Have you tried holding down the 'stop' button for a few seconds until it beeps? Then choosing the programme you want?
If that doesn't work then the helpline should provide more help than they have so far
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Angela Rayner lashes out and calls Sunak “pint sized loser”.