Nokia :: Free SAT Nav For X6?

I have the X6 16gb with virgin and pay £15 per month which gives me 200mins and ultd text. I then travelled to France using the Sat Nav and came back to a bill of around £6 for usinng the Sat Nav and have been charged when ever i use it, virgin have told me to contact Nokia as using the Sat Nav i was charged for GPS usuage (pardon my ignorance but does a sat nav not run of GPS), I have finally spoken to somone at Nokai and they are now telling me the free aspect of the Sat Nav is the application and licence and for data transfer via GPS i will be charged for this via virgin.

I am not willing to pay £5 pm for this from virgin as I genuinely belived i bought a phone with a sat nav not some elctronic maps.