OK, I'm assuming you are able to cancel the program.
If that is the case, you'll need to manually drain the water out via the filter.
Put a shallow dish down (and towels) and slacken the filter cap a little.
Tighten it when you need to empty the dish.
Once you have the machine empty of water, fully unscrew the filter cap and pull out the filter.
Remove the debris jamming the pump.
Ensure the X shaped pump impellor can turn.
Refit the filter and try the machine again.
If all is well, it should be working again.
Obviously, if you cannot do the work yourself, you'll need to get someone in to do the work for you.
Hope this helps