PHX what?

Someone from PHX International called me a while ago. He said that I was one of the chosen qualified UST students for their project and they're up to students from UST,UP,DLSU, and ATENEO. He also mentioned that we don't know each other personally, though he didn't gave me any info about him except that he work for PHX International. He gave me a 3 minute orientation about their project and I didn't understand a single word because our conversation was choppy and I'm not that interested that's why whenever he stops talking I'll just say "ok". After his orientation, he asked my about my schedule tomorrow and on monday, thus asked me if we could meet up either tomorrow 3pm or on Monday 6:30am. I said Ok and he gave me the directions. He said that their office is located at Pasig. he said, that I should take an FX going to pasig and have me dropped off at LINDEN Suite Hotel and then I have to walk and make sure to pass by BDO and Robinson's Bank.  And he even made sure that if ever i'm going to cancel our appointment, it shouldn't be a last minute cancellation, --"May isang salita naman ang mga taga UST diba?" he added. After we ended up our conversation, I called up my dad and told him about this PHX thing. He said that I shouldn't believe this because this might be a scam.

Now i'm thinking, how did this guy know that I'm from UST and I'm Janine Go?

Maybe i've been sharing too much information about me on all my social networks, don't you think? Oh geez.