Activation of VPN WITH code

Avast Mobile Security Avast Mobile Security for Android
1

I have payed for VPN for multiple units and I have the code, but when trying to actvate VPN on my android tablet I do not find where to add the code so the VPN start running?
This is EXTREMELY irritating! I have payed for something I can not use?

2

→ https://support.avast.com/article/Troubleshoot-activation