random country code selected at payment page

[ebaschiera]

When I am going to make a new transaction, the country code is wrongly parsed from billing telephone number. If for example my billing phone number is "041123456" (legit Italian number without country code at the beginning), on satispay number input page the country code selector will show the following default selection: "+41".
The module logic should ignore the billing telephone number when it doesn't start with a country code.