Thanks for positive feedback, Meicheng. Wifi is limited to 1 giga pro day, as written in the listing and in the guide book in the apartment. We provided you in anycase with one free giga extra; as you stayed beyond check-out hour, it cut out automatically. It is difficult, expensive and not interesting to have in that area unlimited wifi, so free wifi is a benefit we offer our guests without extra fees.
In the listing and in the guide in the apartment it's written where you could find free wifi area nearby, as I explained you: public library and pubs 30 meters from the apartment and then there is Openwifi Milan almost everywhere!
Next time we will provide you unlimited free wifi!