The woman in matriculation office had told us this deadline is written in our TUM online account, and I said: No, it is a deadline only for tution fee. She said if you don't make your matriculation by this date, of course we dont kick you out but this date is important only for gettinf the Student ID in the right time, so we can have cheap transportation, library, blah blah...
Secondly, There is another woman now in studentenwerk. She told me Tanja G. is in her holidays.
Third, I can also suggest you to find a cheap hostel for month or sth. I stayed in a hostel called "Wombats Hostel" it costs daily 12 Euro. That was a very good hostel. Clean. but you share your room with 7 people. I think if you search, maybe you can find some hostels for 8/10 Euros per night. This can save you
for the first days in Munich. If you plan to stay in a hostel in the beginning you should book it quickly, 'cause as you know, there will be an october fest soon.
see you soon.