Annoying
to say the least but presumably this covers their actions .
"Sky Talk call packages are provided for domestic purposes only and must not be used for any business or commercial purpose.
If your use of 'unlimited', 'free' or 'no-charge' calls provided as part of your Sky Talk package exceeds that reasonably expected of a person using the service for domestic purposes, we may:
1. Restrict your call service and/or
2. Charge you Sky Talk’s standard rates for any calls exceeding those reasonably expected of a person using this service for domestic purposes.
We will inform you before we start charging you our standard rates."
http://www.sky.com/shop/terms-conditions/talk/acceptable-use-policy/Also in the small print..
"UK calls of up to an hour to 01, 02, 03, 0845,
0870 & UK mobile numbers only (
excludes Channel Islands,
indirect access, dial-up internet & 070 numbers). Acceptable Use Policy applies."