Negative Credit Units
So I refunded a $20 bundle and ended up recieving 1,999 Negative Credit Units. The problem is that I have to pay $30 for 2,999 credits or $10 for 999 credits, and if I buy two $10 packages I'll be off 1 credit. I don't want to waste $30 after being refunded $20, so what should I do so I don't waste $30?