H&R Block

I filed my taxes this year with H&R Block. I've filed with them for the past 3-4 years..this year the guy who did mine seemed to rush right through them, wasn't very good about answering questions, and the software told him several times to go back and fix errors. Almost through the entire thing I kept telling myself in my head to make him stop and to disregard because I didn't want to file with them anymore, but unfortunately I didn't. I still have an uneasy feeling, and I feel ripped off because of how much they charged me to file..$260 some dollars because I had to have special forms (student loan interest and casino winnings) what can I do? I feel like I'm not getting as much money back as I should be, but I think it's too late since they already submitted them. Any ideas/suggestions?