WHOA!!!! Before ya'll agree to lynch that cheatin' video guy let's all take a step back and those of us that have had to actually deal with one chance to shoot it video events like weddings - not the controlled environment of the church - but the wild and crazy venue of the reception can speak up.

During the late 80s into the 90s I was a very successful Wedding video guy using multi broadcast quality cameras (using 3/4in tape) to capture consumer events like weddings. I did about 340 weddings in all kinds of places.

I was blessed to never have a dissatisfied client and even got some raves and analog A/B roll tape editing was much more difficult - imo - than current work with digital files.

You may know and, if not, that shooting unrehearsed live stuff is not terribly easy to do well. All ceremony/'alter stuff or behind-the-scene stuff I had principals wearing wireless mics. In big reception crowds which sounds like what you are describing getting a good capture of people talking in a crowd with all of the surrounding ambient sound is almost impossible.

I used hand held mics doing reception interviews but with general "speech" capture it was and always is catch as catch can.

Your wedding (no wedding) is scripted and shot on a controlled sound stage. It's candid camera most always.

Also if you truly haven't done much post production don't set yourself up for disappointment with an assumption that you can just get the raw video and create a great wedding video. If it was that easy then truly everyone would just have their Uncle Charlie do it all with his trusty camcorder.

Without seeing your edited video and then talking to the videographer I and no one else can make a judgement.

If you are "crying" about low volume of talking that is hard to hear due to a bunch of ambient venue background music and crowd noise then you just may have expected too much without understand the limitations of technology applied.

Remember that when I specifically was recording talking head wedding guests around the reception venue I either darn well had them in a controlled situation wherein my camera top mic would capture their voices or I had them hold a hand held microphone but that was just me.

So, maybe you have a gripe if your video guy didn't really know how to capture good image and sound of pre-ceremony, ceremony and reception scenes - can't say without seeing it all.
Hope it works out and, again, try to understand whatever environment obstacles your video guy had to deal with.