If you are experiencing issues with your device not charging, we recommend trying a different outlet. If that does not work, you should try using a different charger entirely. If that produces no results, then there may be a bigger issue at hand. After sometime, it is not uncommon for some charging ports to wear out a bit.
Please feel free to contact support, or our returns department to see if the device is still under warranty with us. We'd be happy to help!