1998 Hyundai Accent 10.00 dollars back

I asked question today on 1998 hyundia accent about crankshaft sensor i donated 10.00 some how it took $20, how do i get my $10.00 back, oh yea find out number on crankshaft sensor was wrong, but if don't put 10.00 back in my checking or tell me how, ima done if no one anwsers me by money i will go to my bank ask for my whole 20.00 back it took 10.00 i didn't authorize becasue i done it twice didn't think it worked first time so please put 10.00 back in bank