If the problem with this is you paid for a Gold subscription on a account you didn't want to, you can probably ask around some Xbox forums if you can transfer your payment, I don't know what the refunding is like.
If you can't do that, just play on the new account until the subscription expires. Sure, you wouldn't be getting any gamerscore added to your actual account, but you wouldn't be wasting it.
I don't know much about this, I'm just trying to be helpful.
Also, how much gamerscore points did you have anyway? If it's around 10,000 I wouldn't worry about keeping it. You can easily start over.