1. punta ka sa gateway mo (usually pag globe ito yung gateway 192.168.254.254)
2. login ka try mo yung user user
3. wifi then block MAC Address makesure na tama yung mac address na ibo-block mo or kung whitelist naman makesure na tamang mac address yung i aallowed mo once kasi na nablock mo yung phone mo need mo muna manghiram ng phone ng iba para i unblock yung own device mo or kung whitelist naman need mo muna hiramin yung allowed device na nakalagay sa whitelist para ilagay yung device mo.
first question, eh... pa'no sila naka-connect? in-allow mo ba sila dati, at ayaw mo na ngayon?
even more importantly, you're not using default settings on you router, right?