CANCELATION OF CONTRACT

I HAVE TAKE A VEHICLE WITH PLANET 42 OVER A MINUMUM OF PEROD OF 6 MONTHS AS STATED IN THE CONTRACT DOCUMENTS. THEY STATE THAT YOU WILL BE LIABALE TO PAY A ONE MONTHS CANCELLATION FEE THAT IS EQUIVALENT TO 1 MONTHS RENTAL FEE. I SENT THEM AN EMAIL YESTRADY STTAING THAT I WOULD LIKE TO CANCEL AS RECEIVED AN EMAIL FROM SIMONE STATING THAT I NEED TO GIVE NOTICE IN DECEMBER AND SO I GAVE NOTICE, NOW I RECEIVED ANOTHER EMAIL STATING THAT I NEED TO GIVE NOTICE IN JANUARY. THEY NEED TO TELL ME WHERE TO DROP OF THE VEHICLE , WHICH THEY SAY THEY WILL ONLY NOTIFY ME OF THE DROP OFF LOCATION IN JANUARY?