Why would they think you are an apostate if you want to go back to the org? It shouldn't matter to them what you were doing while you were out, it is the future that counts.
Having said that you need to think very seriously about going back. Are you going back so you can have contact with your family (which I can completely understand) or are you going back because you really do think they are teaching the truth.
If it is the latter I strongly suggest you check out books or websites written by exwitnesses. The best book for any witness or exwitness to read is 'Crisis of Conscience' by Ray Franz who was a member of their governing body. It is not a bitter or vengeful at all, it simply tells people what really goes on behond the scenes.
It is ridiculous they wouldn't answer your questions until you were formally accepted back. Very unchristlike.
By the way I was not an elder but MS and pioneer for 10 years. Good luck