Odd vendor experience

Hello all,
I am not sure what to do with what happened at my wedding yesterday so I wanted to ask for help on this.
My fiance and I chose a lower-budget DJ, but they came with great reviews. The communication was good initially, then the DJ would not respond for several days, weeks, month. I began to notice the emails they did send were signed by a woman, but all reviews talked about a man being the DJ—I later found out this woman is his wife. It became very hard to get ahold of them, and they were a big source of stress in our planning. It was so hard to get ahold of them (well, her), that I guess I didn’t ask as many questions as I should have.My wedding day comes and they never call me to let me know when they arrive, but I do hear music at the venue and nothing seems amiss. I didn’t know whether to expect the DJ or his wife or both. We lined up to start the processional and a man walks up and introduces himself as our DJ, and it’s this guy I’ve never heard of and he offers no explanation as to why he was there instead of the guy I contracted with. My wedding party was right there so I didn’t know how to react but I was stunned and upset.Honestly, the music was corny. He played 5 songs from Grease, in a row. He called us onto the dance floor and made the guests sing “Don’t Stop Believing” to us. It was the opposite of what I wanted.I feel very hurt and tricked in all of this. I did later learn that the DJ I had been in contact with (kind of) was also there all along but I have no idea what he did—music maybe?What can I do about this? Is it fair to ask for some money back? How serious would leaving a bad review be?