You can cancel your Skype Number subscription at any time. To cancel your Skype Number:
When you cancel your Skype Number, your subscription will remain active until its expiry date. After it expires, Skype will reserve your Skype Number for you on your account for 90 days. This means no one else but you can purchase this particular number during this period. You can renew your Skype Number subscription from your account. Skype numbers can be cancelled, but not refunded; learn more.
To reactivate your Skype Number:
Your Skype Number will be reactivated as soon as your payment has been accepted.