When i was on my way back home, i bought the splitter and i changed the one in my house. No luck. My phone was dead as well, so i finally decided to leave it just for now. What do you know? When i tried to trick the modem so i could get some IP from the modem, the DSL works and now i'm back online again.
I don't know what's the problem, but the good thing is that now i can go online again.