You might want to contact my tuition agent. She recommended my girl's tutor to me. And recently I also just got a tutor for my Sec 2 son from her. And best part is we parents dont't need to pay for her tutor recommendation service at all! dont't worry I tried her service twice before so I know she's good. Just tell her your preference for the tutor, preferred days and time etc. If you ask me, best is get an undergraduate. Undergrads are cheap and good, especially if you get the ones with experience in teaching.
Hope my recommendation helps