There isn't a telephone # to contact Skype.
You can File a support request .
Skype doesn't have telephone support. You can start with this link to contact Support: contact customer service
Or, if you provide more details, a fellow user on this forum might be able to help.
Are you signing in to your Skype account with a browser, or that actual Skype program? A common problem that new users experience is trying to make calls or use other Skype features signed in with a browser and that won't work. You have to actuall download, install and sign in to the Skype program.