First off, we recommend that you backup your device before trying any kind of update. This way you can easily re-install your apps after a big update.
Second, be sure that you install the latest update for your 9810. Currently that is this version here... VIVO_9810_22.214.171.1249 - Downloads - BlackBerryOS.com
Doing these two things may get your device back on track. Let us know if you need further assistance.