In reference to the comment made about the PC World calls. There are real calls conducted by PC World to assist their Knowhow customers. It is a sad world where we chalk all help from our solution providers up to being some sort of a scam.
There are legitimate support calls being done by the Knowhow team to assist customers in using the services they purchased.
If for whatever reason you question the validity of these calls you can always call the phone number provided in the email sent to you by firstname.lastname@example.org and then at least you know you speaking the genuine Knowhow support.
Just to let you know in case you never noticed, you are replying to a post that is almost three years old with the last post about two years ago however your answer is informative may be helpful to others.