It has 50/50 chances that they will return your application or they will assume that it belongs to Singapore. Do not worry, hang in there and CIC will contact you if needed.
Dear ripon243!
Certainly you did a mistake. I saw many cases here return for wrong VISA office provided. I'm bit confused about you because you at CIO stage...... No case no or reference no you have. So if you send a correction then how it will reach there? Probably it will be return to you except they are special kind to you. Best of luck..... praying for the best.