@llamadelray Contact support: https://help.fitbit.com/?l=en_US&cu=1&fs=ContactUs
Is it out of warranty?
If not? Do not do this.
Using a small fine needle. Carefully see if you can lift the left button to release it. It may just be a really small 'fine piece of dirt' making it stick.
Buttons on mine started to stick so I applied a very small amount WD40 off end of said pin to lubricate them.
If you are not confident enough to do this yourself go to a jeweller, an horologist (person that repairs clocks & watches) or a watch repair shop. Hope you get it sorted.
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