Hina, I'm new to this appeal process, but since you say you won your hearing, that means you are already approved to come to Canada and all the rest is just formality? To make sure nothing has changed in you medical health and background, which I doubt it has, is all they are doing. You won't have to have another interview, you're already approved. If anyone on hear knows differently please comment but really I don't think you have anything to worry about, just be patient till the process is complete