If you can convince your provider that the calls were not legitimate or the premium number provider did not disclose fees, etc. your provider will probably tell

If you can convince your provider that the calls were not legitimate or the premium number provider did not disclose fees, etc. your provider will probably tell the premium number's provider to pound sand. Or convince them it was your kid. At least in the US, people under 18 cannot make these calls and so don't have to pay.