Unless it is in your contract that you provide the raw footage, it is yours to do with as you please. You can charge them, you can refuse them, whatever you wish. That is not a copyright issue though and even by selling or giving them the raw footage, you do not relinquish your copyrights unless you choose to do so.
So, even after you give/sell them the footage, you still retain the copyrights on the images until you transfer them. As such, they have no right to use the footage for much of anything unless you allow it.