Product: Credit card

I had XXXX work which started late XX/XX/XXXX, I agreed to a monthly payment on my Visa-Chase credit card because cost of work would be in thousands requiring many months to complete. XX/XX/XXXX I stopped going to the dentist due to the problems with the work performed! 
XX/XX/XXXX I visited another dentist for a 2nd opinion-evaluation of my XXXX condition! The 2nd dentist did a thorough evaluation, diagnosis, XXXX, XXXX and XXXX. He showed & explained the wrong treatment & poor quality work by the 1st dentist. 2nd dentist explained he will have to undo the work by 1st dentist ( take out the long & expensive XXXX ). 
XX/XX/XXXX I informed and asked Chase Bank to stop accepting any payments from the vendor because I was disputing the payments, I was told that I could only go back 3 months to dispute charges, I agreed to dispute payments from XX/XX/XXXX to XX/XX/XXXX and instructed to put a STOP/BLOCK & not accept any future charges from the vendor hence forth. The representative agreed and informed a stop/block for any future payments was in place. XX/XX/XXXX I was again charged by vendor, I called and asked the bank why the payment was accepted, I was told sometimes it can take a couple of weeks for block to take effect, since charges were in dispute I should disregard/not pay the charges. I called the 1st Dr 's office XXXX week of XX/XX/XXXX, talked/discussed with office manager " XXXX '', explained the problems and the reason for disputing the charges and not to charge my card hence forth. She asked me to come and see the Dr . I told her it would be best if both dentist 's discussed each other. XXXX asked me to send-Email the prognosis-treatment for the dentist to review. 2nd dentist office emailed complete evaluation and treatment plan to the 1st dentist. XX/XX/XXXX again vendor charge appeared & I called the bank, was told that block was in effect but the bank has no control if vendor changes their name & or ID # to process the charges hence block would not be able to detected and again I was told not pay the charges. 
XX/XX/XXXX I was again charged, called the bank on XX/XX/XXXX and again was given the same reason for charges i.e. bank has no control if the vendor processes the payment under different name & or ID #, I asked to be connected to a dispute supervisor, explained the entire case to XXXX, she asked if I would agree to a 3 way call with the vendor, I agreed and office manager " XXXX '' told me she had not received any information from the 2nd dentist which I disputed. I informed XXXX that information would be re sent/emailed ASAP, XXXX informed not to send the information to her/bank. 
Information was re-sent on XX/XX/XXXX, on XX/XX/XXXX " XXXX '' from 1st Dr 's office called & told me the Dr does not understand the info received/sent to them, I told her since I was a layman, it would be best for both Dr 's to talk to each other and resolve the problems, she agreed & would let the Dr know. 
On XX/XX/XXXX I receive a letter from the bank stating my dispute has been declined and Chase bank had informed the XXXX credit agencies stating the outstanding amount due on my account. 
I called the bank, talked to XXXX who transferred me to dispute supervisor XXXX. After reviewing the entire case with XXXX, he refused to agree about the dispute, I asked him to provide me the charges from the vendor from XX/XX/XXXX if they were processed under a different name & ID #, he refused to provide this confirmation & said as per the bank the dispute is not accepted. I asked if the vendor has any signed papers from me agreeing to monthly payments & he again refused to confirm or provide any documents. 
I do n't understand if customer asks for a block even then anyone can keep on processing payments till whenever?