Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
Try a restart. Do it at least 3 times.
Restart
http://help.fitbit.com/articles/en_US/Help_article/1186/?q=restart&l=en_US&fs=Search&pn=1
If that doesn't help
Contact Support
http://help.fitbit.com/?cu=1
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Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Welcome to the Family @julialg! Sorry about your band 
If you have done the restart using the instructions given by @WendyB above, then it might be time to contact our Support Team for further assistance.
I'll be waiting for your reply, keep me posted! 
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Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
It's nice to see you here again @julialg! Thank you for the heads up. I'm happy to know that you're back on track! 
Keep up the super stepping, I'll be around in case that you need anything else! 
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