Niteflirt is having a major issues right now, calls not being credited to their account, and as far as I know there are no international calls anymore.
I have not used NF in years but have been reading about the issues. I am sure a current NF girl could help you out more.
If you have any skills in marketing, I would recommend getting a toll free, a site, and doing it for yourself using a 3rd party processor.
Bee