Play on line and avoid the clerks and make sure the read backs are right on the phone. The bettor is supposed to control the betting and if there are any doubts check your plays on line or have someone you know log in and make sure they are right if you are mobile. These clerks aren't checking their hair while punching in 4 dime bets.
I would just dump the call if it's that bad and tell the manager about your hun after I got a different clerk to place the bet. Another reason not to bet right at post and run into this kind of situation or to even bet on the phone at all. Plenty of large limit books on-line that pay..