Computer was hacked

Hello Mandy,
We're really sorry to hear that you're facing this trouble.
We'll certainly investigate and help you with this.
Are you unable to enter your operating system using the valid credentials?
May I know the operating system of your PC?
Have you contacted the concerned support to sort out this issue? i.e, Microsoft, Apple.,
In order to assist you better, please let us know the below information,
May I know how do you suspect that your PC was hacked? 
Did you receive any threat pop-up/notification from AVG? if yes, please share the screenshot.
Please let us know the name of the AVG program which installed on your PC? i.e, AVG AntiVirus FREE or AVG Internet Security
As you feel that your PC got hacked, please confirm whether you have installed/downloaded any unknown files or applications on your PC. 
If possible, please share the relevant screenshots about your concern, so it will be easier for us to understand your situation. 
Thank you.

Hello Mandy,
We're really sorry to hear that you're facing this trouble.
We'll certainly investigate and help you with this.
Are you unable to enter your operating system using the valid credentials?
May I know the operating system of your PC?
Have you contacted the concerned support to sort out this issue? i.e, Microsoft, Apple.,
In order to assist you better, please let us know the below information,
May I know how do you suspect that your PC was hacked? 
Did you receive any threat pop-up/notification from AVG? if yes, please share the screenshot.
Please let us know the name of the AVG program which installed on your PC? i.e, AVG AntiVirus FREE or AVG Internet Security
As you feel that your PC got hacked, please confirm whether you have installed/downloaded any unknown files or applications on your PC. 
If possible, please share the relevant screenshots about your concern, so it will be easier for us to understand your situation. 
Thank you.

So the other day my laptop was hacked by someone impersonating as AVG saying there was a problem with the site I was on… "To continue click this link" and I did… After that it told me there was a new AVG update. Click to restart and download.
After i restarted. It's saying that my pin was never made and passwords (even tried to reset… Still nothing) was incorrect. I cannot do anything with my laptop without a password. Not even factory reset. What can I do??