I think there is a danger that you should gain some experience with one before buying the other . . . . not that I'd know which to start with.
Camcorders are genrally easier to use when filming, esp with a eye-level viewfinder (so it's strange they all have flip-out LCD's now). They also tend to have longer zooms.
But they will suffer in low-light situations.
DSLRs tend to be awkward for video (although the quality is good, not all produce HD 1080. ) but are good in low-light if using the fast fixed-lens (like f/1.8)...but many now come with a kit-zoom which will be f/3.5 for example... this makes out of focus effects relatively difficult.... beloved for drama but less useful for home-vids of the children. (& good luck on that front, too).
I'm guessing you have little experience of digital cameras (?) hence the questions - but are spending a lot of money without knowing which will serve best.
If the order is completed, you have little choice but to accept what you've ordered. They are good cameras for doing what they were designed to do.
+ Now, get yourself a decent tripod particularly for video - one with a fluid=head if you can stretch to it. Stills cameras have fast shutters and aren't moving about - but video show this up very obviously.