Problem Pure vpn/ vpn help needed

Hi
I had an email from my internet provider saying,
Quote Unfortunately, provider has been contacted by legal representatives of Paramount Pictures regarding the illegal downloading of copyrighted material. They have identified that a provider subscriber has illegally accessed their material on the internet and that they will consider legal proceedings against provider if this activity does not cease. Stop Quote
My question is, I always use pure VPN, so they should not be able to tell it was who connected to a torrent site? there is no way to trace me that I missed? it would only show i downloaded from pure VPN server not a torrent site? provider is my internet service provider which a community based one .
Thanks