Offer!

Today I got an sms from someone...don't know who's the sender is. I thought, the sender is she..offered me to be a 'cikgu ganti' for English subject. Hmmm...sounds interesting. Then, I replied through another number...also mine, because the number that she sent me sms temporarily barred. Cannot reply sms even call the sender. But...no answer until I type this in my blog. What should I do? Who's the sender?