Hi @Biggordy1, please accept my apologies as I've completely misunderstood your original post - I was referring free of charge calls to Virgin Media customer services.
As you're referring to Virgin Media to Media landline calls, you are correct and it does depend on exactly what package you're on.
For example if you're only on Talk Weekends, and you call somebody (on Virgin Media landline) in the week, then you will be charged for this call as it's not within your allowance of Weekend minutes.
I hope this helps and I'm very sorry for any inconvenience caused.
Many thanks
Tom_W