Applying a deposit to another reservation?

[bentopher]

Can this be done at all?

I have 2 reservations. One is a package, and one is just 3 nights at a hotel.
I want to cancel the hotel, and extend my package.

I had to pay for 1 night hotel stay as a deposit, and I wanted that amount to be applied toward my existing package reservation, as opposed to them crediting my credit card.

Namely because I am Canadian, and the refund with exchange means I'll lose money. So I'd rather just apply it to the other one.

Anyone know if this can be done? or had success in doing so?