Overcharging your credit card and refuse to listen to reason

Customer service is non existing. Sent an email for support, only to be ignored. I then called, and the rude agent insists that I am not correct. They have overcharged my credit card and the agent refuses to understand the query and refuses to accept that they have overcharged my credit card. Be weary of using their service, you will end up paying for services that have not been rendered. their terms and condition clearly state "For Repeat Bookings, you authorise us to charge your cheque / credit card after the scheduled end-time for the visit." but they process the payment of the first booking on the day you have booked, as well as the day after the service was rendered.