We'll need a bit more to go on - SM65 is not the model number. Have a close look at the top off the inner door; you should find the model no. etched into the top surface.
Some of these machines have a separate switch which is not too expensive, some are a combined "keyboard" which may be rather dear.
Bosch is a quality brand, for a failure as simple as this one it may well be worth having it repaired.
Bear in mind also that an independant repairer may well have a lower labour charge than sending for Bosch!
If you check in "Directories", you might find a local UKW repairer, or put your post code up in here and somebody may well respond.
Which bit of "Unplug it" is causing the problem?
Stop eMailing me. This is a perfectly good forum - use it!