Then you don't have a valid backup, no backup = no coins.

On the description of your problem is the issue, if you don't have access to the privatekeys then you don't have access to the coins, easy as that. Just imagine what will happen if any one coud spend coins without having access to the privatekeys, lol, any one would be able to spend others coins. And that isn't a good deal at all for the coin. would be like the carding, some one spending money from your card using your name. That's a scam, so, the best thing you can do is to try to recover those privatekeys, find the right way to load your backup, that should be the way.