I WONT PAY FOR WHAT I DONT OWE

Time and time their service has being *******. The habit of charging you fares you don't recognize. I have tried to reach out to their customer service with no response and this is not a first time am facing such :I took a trip with no hiccups or delays and paid what i was charged for hrs later I cant request again claiming am owing .I am unable to make use of my account till I pay for what they are claiming. Last time I paid since customer service was ******* but this time I refuse to be bul**** into a corner to pay for what I know I don't owe