<human>: Can you provide a brief overview of the text?

Around Thanksgiving I was hired to spend a week filming a band as they toured with a very well known group to create a music video for one of the songs that they performed live. The agreed upon rate was $500 which was agreed upon verbally without a contract. (it was a a referral from a good friend)

Anyways, I delivered a final cut in December and basically was met with silence from the group's management. Took me awhile to figure out what was going on; but, basically, the group members loved the video however their label did not. 

So their label went out and had them re-shoot something with some video guys (without my knowledge) and I finally saw a cut of their new version and it's awful (looks like a corporate music video). But, that's not important, what matters is that their plan is to splice my version into their version.

One of the reasons I agreed to the exceptionally low rate was for the exposure as they're gaining popularity. If they're going to create some Frankenstein mis-matched music video that completely erodes my benefits from the project.

And so, since they had not paid after ≈45 days, I emailed their manager saying that I was not okay with this and wanted to re-negotiate terms as I still own copyright on all of my material, had yet to sign anything, and have not been paid.

I'd like to make them several offers... such as allowing them to pay the original $500 and post my original video without any edits. Another would be for a significant increase in my fees if they are insistent upon combining the two videos together. And perhaps lastly, not agreeing to anything if there not willing to pay an increased amount and withholding copyright from them for violation of the agreement.

So is everything I've proposed all within my legal rights? Any suggestions? I'm not looking to be a difficult person to work with, I just do not like being taken advantage of by people with rampant egos.
<bot>: Shot music video. Label hasn't paid after close to 2 months and wants to make significant changes for no reason without telling me. I'm not okay with this. Exerting my copyright claims to ensure I don't get screwed.