Phone number deactivated after cancelling my contract, is there a chance to reactivate it?

I'm sorry, @Med-Amine, but unless you specifically asked our cancellation department to change the subscription back into prepaid, the number is gone. 

Correction: I found that the above is not necessarily true. There is a limited window of time in which a cancelled subscription (including the phone number) can be re-activated into a new contract. The way to get this done is to call us at 0800-0402.