Business ProfileforCity of Boston Credit Union

I have a car loan with City of Boston Credit Union. I have had this loan for 4 years and it is current and not delinquent or in default in any way. Three months ago, for the first time, I started receiving letters requesting evidence of insurance coverage. The letter included a link to a website called validatemyinsurance.com. Upon visiting that website, I was asked to upload detailed policy information for my car demonstrating coverage. I uploaded the information and answered all of the questions. I received a message from the website that said that all data uploaded and questions were answered satisfactorily. I maintain full insurance for this car. The next month I received another letter from City of Boston CU. It said that it still had not received my response to insurance coverage. Once again, I visited the website, uploaded the same info and answered the same questions and received the same satisfactory answer. This month, I received a letter that said that City of Boston CU had still not received the info and that they had taken out insurance on my behalf for $1672. I called the Credit Union and they misidentified my insurance on the phone (said I had Geico when I have travelers) and told me the letter was "automatic" and there is nothing they can do. I asked if I could pay off my loan because dealing with their internal control issues was more time consuming than just paying off the loan. They told me that "this is another department and they are not here to help you." I have no other numbers to call. I have complied with all of the letters. My account is in good standing and my car has more than the statutory requirements for insurance. I need them to stop harassing me with these letters threatening to charge me for excess insurance coverage. I am fully covered by my own policies and I do not understand why they are doing this in the last year of *********** loan number is ********* and the car is serial number *****************.