Product: Credit card

This is what happened and I need to be protected because I never made a purchase for {$110.00} and I've tried to show Discover all kinds of evidence. 

XX/XX/XXXX I got {$11.00} of gas with a chip charge at gas pump # 1. 
Immediately after, as I have an alert on my card for charges above {$50.00}, an alert warned me that my card had been charged {$110.00}. 
I called Discover customer center, explained what happened, and asked to block my card. 
End of XXXX, XXXX I received my account summary and I saw {$110.00} in my charges. 
XX/XX/XXXX I called Discover 's billing dpt. and a dispute case ( # XXXX ) was opened. Nobody told me that it was not a dispute but a fraud case. 
End of XXXX, XXXX On my statement there was still a charge for {$110.00}. 
XX/XX/XXXX I called Discover 's billing dpt. -- they have no news and told me that my dispute case was a big inconvenience because it should have been handled by the fraud dpt from the onset. 
I called the fraud dpt. and they opened a case ( # XXXX ) End of XXXX The charge of {$110.00} is still on my statement. 
XX/XX/XXXX I called the fraud dpt. and I was told that it was obviously a fraud and that theyd close the case. 
XX/XX/XXXX I decided to close the card account and paid all charges made by me ( as I have always done ). 
End of XXXX I still saw {$110.00} on my statement. 
XX/XX/XXXX I called the fraud dpt for an explanation and I was told that I was responsible for the {$110.00} charge unless I could provide new evidence. 
XX/XX/XXXX I received a letter from customer protection services, informing me that my dispute ( wasnt it fraud and not a dispute??? ) has been closed and that without additional information they can not reinitiate the investigation and that they will report my replacement account as disputed to 4 credit reporting agencies. 
XXXX XXXX I called the customer protection service and asked to talk with a supervisor, but I was told that no one was available and theyd call me back within 48 hours. Nobody ever called back. 
XX/XX/XXXX I decided to go to the gas station and ask for the video tapes so that I could prove that I never went inside the merchandise store and that I only made one transaction at the pump. On the pump # 1, the one I used, there was a warning not to use credit cards. I went inside the store and asked since when the pump has had this warning, and they told me since the summer. I took pictures. 
XX/XX/XXXX Between the XXXX and XXXX XXXX Holidays, I called several times in order to get an email address to which I could send my new documentation but either I got disconnected or whoever answered my calls didnt know of any email. Only on XX/XX/XXXX, I was given a fax number and the Discover employee explained that they have no emails. She promised that she would file a complaint on my behalf. 
XX/XX/XXXX From my bank I faxed the new evidence ( pictures of the gas pump included ) and the transmission was " successful ''. 
End of XXXX The charge of {$110.00} plus {$2.00} of interest was on my statement. I called the Discover 's fraud dpt and was told that the fax dpt had not brought them any fax. 
XX/XX/XXXX I resent the fax from my bank and the transmission was " successful ''. 
XX/XX/XXXX I received my new statement and now I have still a {$110.00} charge, plus {$2.00} interest, and {$30.00} late fee.