My phone got locked showing the message 'the phone is safely locked by antivirus application'

My phone got locked showing the message 'the phone is safely locked by antivirus

Hello Mani,

I am sorry to know that your mobile phone got locked.
To unlock your phone please follow the instructions mentioned in this link: http://avgread.me/1JEloSz .
If that doesnt help, Please click on this link: https://support.avg.com/support_contact_form?l=&retUrl=support_sales .
Select the option as "YES" and the operating system as "ANDROID"
Fill in the details and click on the option "answer via email"
Once your request is submitted you will be getting the prompt answer via email from our mobile team. Or you can open AVG Anti-virus app/AVG Cleaner app >Tap on drawer >Click on Help and support-> Contact support and fill the form.