The only wallet that I would trust on windows phone is Copay.
Actually, it's the
only choice of wallet listed in Bitcoin.org (go to Mobile > Windows Phone). Anything that isn't listed there, I wouldn't trust with my money.
There isn't much app development going on for Windows Phone. Any other wallet would be very sketchy.
@OP, it would be better for you to use a wallet on your computer or sweep the funds to your windows phone copay wallet.