Product: Credit card or prepaid card

Claim # XXXX My name is XXXX XXXX and this correspondence is related to an existing dispute I have opened for a transaction listed on my credit card account ending in XXXX. The transaction was initiated by XXXX XXXX XXXX in the amount of {$170.00} on XX/XX/2018. I have attempted several times to resolve this matter with Chase ( including submitting several document such as x-rays and a receipt from another dentist ), however, they refuse to assist with my request for assistance. I am now reaching out to the CFPB to investigate further on my behalf. It is my opinion that I have provided overwhelming evidence to Chase that the charge in question is invalid as the services promised were never actually provided. I am requesting a full refund of the amount billed to my account. 
My dispute is rather simple. I went to XXXX XXXX XXXX after requesting assistance with a XXXX  to my XXXX XXXX XXXX. The XXXX  did not XXXX  the XXXX XXXX. The same XXXX  I paid to have XXXX  was XXXX  approximately one week after I visited this facility and remitted payment for the services provided. I would be shocked to find any logical person that expects an expensive dental repair to last for less than one year let alone one week. 
To be clear, I am wholly dissatisfied with the services provided by XXXX XXXX XXXX, which I paid for in the amount of {$170.00}. This statement can be confirmed as I was compelled to visit another dentist to have the same work redone. This was an extremely stressful and unfortunate because I was living in XXXX XXXX at the time and had to visit a facility in a foreign country for the repair. 
Prior to reaching out to Chase for assistance, I did attempt to resolve this matter with the merchant directly. I reached out via phone on XX/XX/XXXX and asked to speak with a member of the management team at the office to help resolve the matter. I was told that someone would reach back out to me via phone or email, however, this never happened. 
I called the office again on XX/XX/XXXX and was able to speak to the billing manager at the practice. She informed me that her office would not refund me as I requested. She indicated that because I signed a consent for XXXX  service document and paid for the services prior to leaving the office had no legal requirement to assist me. When I questioned the relevance of a consent for XXXX   service in relation to the conversation we were having, the billing manager proceeded to scream over the telephone and insult me. After this experience it quickly became apparent that XXXX XXXX XXXX will not be cooperating with me to resolve this matter. 
To be clear, I never consented to paying for such inadequate and poor quality dental work. I also did not excuse XXXX XXXX XXXX from their obligation to refund me after the work they conducted needed to be redone a week later. 
I am very disappointed with the services provided by XXXX XXXX XXXX to include the abusive behavior I endured upon attempting to resolve the matter directly with them. 
I am equally disappointed with Chase as this bank has failed to meet its obligations to rectify this billing error on my account. I should not be forced to pay for services that were conducted improperly.