Hello to both.
It depends upon which "Premium Plan" option you have. Only the 3 and 12-month options include free calling.
If you have either of those options and you are not able to make free calls to the USA/Canada please file here: https://support.skype.com/en/faq/FA1170/How-can-I-
TIME ZONE - US EASTERN - PHILADELPHIA PA USA - UTC MINUS 5 HOURS
I recommend that you always run the latest software version: Windows & Mac
If my advice helped to fix your issue please mark it as a solution to help others.
Please note that I generally don't respond to unsolicited Private Messages. Thank you.
This is what hapnd with my premium subscription 12 months purchase.
There was an option box for selecting Unlimited calls to USA and Canada. I remember I had chosen it before I enter into the payment page, but later some how, I accidentally unchecked the option box. When I rechecked my payment receipt, I realized that there was not Call to USA and Canada Item in the receipt. So I contacted to skype team by Online chat and they refunded my money back. I purchased skype premium again by choosing Calls to USA and Canada carefully. Now I can make calls. Thanks again.