I need to apologise for the information I posted - I just did not want to be too meticulous and bore all readers!!!
Actually, I received an e-mail saying that I was approved for admission and that for the period of up to four to six weeks I would receive an official postal mail with the offer. Exactly one week later I received it.
I applied for a Master Degree in Pure Mathematics. If you are applying for something else, then it is not necessary to be informed in the same way as I was - you may receive directly a postal offer
Moreover decision deadlines are probably different for different majors.
If you have any questions Simone, I will be glad to share with you - I can imagine how anxious you feel
We are all in the same boat