bus drivers - you've gotta love em!!!!

the last four occassions ive travelled to town from my house, ive been charged three different prices...now hang on a minute....isnt there a set price you are meant to be charged?! the first time i was charged 50p because i had my connexions card i was charged half fair, that i was fine with!! the second time £1...hmmm....full fair still not too bad. but wait, yesterday i was charged £1.40?! thats 90p difference from last week!!! and then today i was charged £1 again....each time its been a different bus driver....but i said to the man today that i was charged £1.40 yesterday and he said that it should be £1 at the max and with my student connexions card thing 50p!! so i was riped off yesterday!!! yeah i sound like a cheap skate!! but i dont care!!! i need my money and every lil penny makes a difference!!! wonder what il be charged next time i deside to use the bus to go to town.....