My name is***** will assist you. I am sorry to hear that happened.
If you have a google account connected to the phone you can use android device manager to reset the password........PLEASE CLICK HERE<<< then sign in with your google account and password. Then choose lock, then google will ask you to create a new password. Then you can use that password ***** unlock your screen on the lg.
If you can not do the above you will have to do a factory restore on the phone> Please follow these steps>- Turn Off your Samsung Galaxy device.- Wait for 10 seconds, Then move to the next step.- Press and hold Volume Up key + Power key.- Keep pressing the above keys until the Samsung Logo appears,Then release Power key only.- When you see Factory reset / System Recovery menu on screen release the Volume Up Key.- Use Volume Down key to select Wipe Data / Factory Reset option.- Use Power key to confirm the operation.- You need to use the Volume Down key again to select "Yes -- delete all user data"- Use Power key to confirm.- After performing the hard reset, Select Reboot System Now option, And confirm it using Power key.- Now the tablet will reboot, Wait for it to be fully on and then you can start using it.
*****Please let me know if you need any other assistance.Please take a moment to rate my service positively.Thank you very much!