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Try a different USB port on your computer first .
Please clean the contacts
http://help.fitbit.com/articles/en_US/Help_article/My-tracker-s-battery-isn-t-charging/?q=not+chargi...
Then Do a Restart
http://help.fitbit.com/articles/en_US/Help_article/1186/?q=restart&l=en_US&fs=Search&pn=1
Also See this thread for charging best practices. If you are not charging it correctly you could be damaging the battery
https://community.fitbit.com/t5/Charge/Fitbit-charge-battery-problems/m-p/1323307#M53291
http://help.fitbit.com/articles/en_US/Help_article/1799
If it doesn't help Contact Support but please let them know all the steps you did
http://help.fitbit.com/?cu=1
Check out the discussions boards! A lot going on and I'm sure you have some contributions as well!
Hope to see you around!
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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
Hey there, @Beastofbolton! Welcome to the Family! 
You have some excellent steps to try! If you found any of those steps useful let's mark @WendyB's post as the solution. Marking posts as solutions is a great way of thanking another community member, while also highlighting their solution; so that it may be discovered more easily by other community member's facing the same questions or issues as you. You can read more about Accepted Solutions.
If this didn't resolve your inquiry, I’ll be more than glad to lend you a hand with that! 
Please keep me posted! 
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