Product: Credit card

This situation has been going on since my XXXX of XXXX when my monthly statement from XXXX XXXX XXXX was sent to me. 
XXXX Case # - XXXX This statement reflected charges for two dates of XX/XX/XXXX and XX/XX/XXXX for {$210.00} and {$330.00} respectively, for a total of {$550.00} for lodging at the XXXX XXXX in XXXX Massachusetts. 
Not recognizing these charges as anything that I had authorized, I contacted the XXXXXXXX XXXX XXXX company to report this apparent false charge on my credit card. I immediately canceled my card and requested a new one be issued. 
On my next statement for XX/XX/XXXX of XXXX through XX/XX/XXXX, a credit was issue for {$550.00}. 
On the following months statement from XX/XX/XXXX through XX/XX/XXXX the charge was reinstated and i was being billed once again for these charges.???? 
Upon contacting the XXXX XXXX XXXX XXXX, I was informed that I these charges had been initiated with my e mail address and that I was being charged as a no show at the hotel. 
I explained that I had searched my e mails and found no confirmation from XXXX regarding this alleged hotel booking, and requested that they send me their e mail confirmation notice. it was never received by me.!!!! 
Contacted the hotel directly and requested a copy of my reservation information, this also was never sent. 
At this point I re contacted XXXX XXXX XXXX and spoke to a Supervisor regarding my findings. ( I can send you if necessary and of the names dates and times that I spoke with a multitude of representatives from this company ). 
I was told at this point, when speaking to a Supervisor, that the reason that I was being recharged for this was that they determined that this was not a fraudulent charge and that I had merely not shown up.??? 
At this point I felt that I was being unfairly charged, and XXXX XXXX XXXX  XXXX was unwilling to support their claim through forwarding and documentation to me. 
On XX/XX/XXXX I immediately canceled my credit card with them and paid off all other charges on this card, except for the {$550.00}. 
I have made multiple attempts since XXXX of XXXX, to seek some closure on this nightmare. 
I am a successful XXXX XXXX XXXX individual who until XXXX had dealt with XXXX XXXX XXXX and XXXX XXXX for over ( 50 ) years. In fact the hotel in question is the one that I spent my honeymoon at and until this issue, returned every year on our Anniversary. 
I made both companies aware of this during our multiple conversations. 
My final attempt at closure with this issue was on XX/XX/XXXX, based on the recommendation of my Attorney that I offer to pay the {$550.00} bill in order to prevent any liens on my property. 
I contacted Supervisor XXXX, XXXX # : XXXX, at the Lets work together to get your account back on track letter telephone number ; XXXX, offering to pay the {$550.00} charge, just to end there constant harassment of the we can work it out letters and the monthly billing for payment and interest fees that have now risen to {$780.00}. 
She informed me that the company would only accept the payment for the entire amount of {$780.00} and offered no other options. 
At this point it appeared that there was no room for negotiation here and ended the phone call.