Unfortunatelly: No.
I've already contacted the company for this mobile service multiple
times and they told me that they won't activate it in the UK and
USA. (Which is horrible since more than 80% of our members are from
the US)
I would like to add Paysafecard, which has already been suggested, but this
might take some more months.
There might be another payment method through the Google Play Store
as soon as our PokéHeroes App is published. But this is for Android
users only and... it'll take some more time until the App is ready
to be released :P