Guys, I think he is saying that he has received his application. i.e. returned from Sydney because of wrong payment. (Correct me if I am wrong).
He sent an email asking them to payback his money. But since at that time he had no application no, CIC would have no way of finding his application and giving him a reply.
If this is what you problem is. Then make a new draft of correct processing fee and submit your application.
Else, if you have applied and you haven't heard from them, then IMHO you need to wait till they reject your application. If you send them a draft now, since you don't have an application no, it will be very difficult for CIC to use that draft for your application, and I think your application would be rejected anyways, but your second draft might b lost somewhere. If you are using credit card payment option, then may be you can use the option suggested by other members. But in case of demand draft do not take the risk.
If I were you, I won't wait for the rejection of first application, rather would send a full new correct application with correct processing fee. First application would be rejected and you will get the refund and second application would be accepted, and you won't lose any time.
But becareful, this was wat i did, and in the end my both applications were approved and my credit card was charged twice
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
now they are gonna refund me the fee of one application but they say it might take upto 8-12 weeks
![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)