skype: they de-activated my account, although I sent a text message from it

Then they sent me an e-mail message, that explains me, how to reactivate it, and again:

Your balance remains active for 180 days after your last call to a landline or mobile phone; or last text message sent from Skype.

I shall see, how true that is.

At least it is not that  bad to get ones account de-activated – you can (always?) re-activate it again.