Please Contact customer service and ask them to unlink your account.
include the below information.
Skype version and platform you are using
What is the exact version number of Skype and what platform you are using (Windows, Mac, Linux, Android, etc.)?
Which option you choose to log in to Skype, if you combine your account:
• Microsoft account
Skype-account you used in the process of merging?
Indicate that combined.
Just had a similar nasty experience when i tried connecting to my skype account from a neighbours' Windows 8 pc. Was about taking down my skype account completely until i figured out a change of my skype password could actually help. It did because after a while I got disconnected from the desktop and it requested for a reconnection or re-login. Don't!
Hope this helps.