Getting refunded for 80% interest on credit card?

[Shimon Oren]

Hey guys, 

I just found out my girlfriend has been paying a $5000 balance of a Discover credit card with monthly payments of $95, while being charged an interest of around $75 every single month – leaving her essentially at the same place after three years of paying it off. I set her up with a 0% APR balance transfer card, but before we transfer the balance I'd like to know how should I negotiate with Discover to help get her refunded, if that's possible?

Thanks so much,

Sean.