Product: Payday loan, title loan, or personal loan

I financed a boat with Yahama Financial Services in XX/XX/XXXX. The monthly payment is {$440.00}. I have paid {$600.00} per month since the first payment. After making a few payments, I noticed the additional {$150.00} was being applied to the next month 's payment instead of the principal. I called and Yahama stated that I must call in each month to request the additional to go towards principal. I was paid 4 months ahead. So when I called in XX/XX/XXXX, I asked for the full amount to be applied towards principal. This happened from November 2021-February 2022. When I paid my {$600.00} in XXXX and called to have the {$150.00} applied towards principal, the remaining balance of {$450.00} went towards interest. I called and was told this was correct. In XXXX when I received my statement, the full {$600.00} went towards interest. I called again and it was discovered that I owed accrued daily interest from XXXX from all of the payments being applied towards principal. I was told I had to pay around {$2300.00} in accrued interest before any money would go towards principal. The person I spoke with said that she would put in a request for the payments to be reallocated from XXXX so the {$440.00} would go towards the note and the additional {$150.00} would go towards principal. She told me it may take a few weeks. I made my {$600.00} each month for XXXX, XXXX, and XXXX. All {$600.00} went towards interest. When I called in XXXX, I was told my account was under review ( from XXXX ) and no one could tell me how much " accrued '' interest I still owed. I spoke with a supervisor and she was able to correct the payments from XXXX XXXX XXXX, or so I was told. When I received my XX/XX/XXXX statement, {$19.00} was applied towards principal and {$580.00} went towards interest. I called AGAIN and was told I owed the back interest. I asked the person, XXXX # XXXX, whom I spoke with if he could see where it was supposed to be fixed in XXXX. He saw where I called in but told me I still owed {$180.00} in accrued interest. I asked to speak to a supervisor again, and was told she ( XXXX # XXXX ) would put my account under review AGAIN. I feel like I am being over charged in interest with this not being handled. I have made {$3600.00} in payments and my balance has decreased {$19.00}. I submitted a complaint with the XXXX XXXX XXXX on XX/XX/XXXX. They have not received any correspondence from Yahama. I would like my account corrected and proof that I was not overcharged in interest with this mix up. I also would like to make a complaint about the numerous disconnections when I call. I get disconnected at least 3 times when I call and when I ask the agents if they can call me back if we are disconnected, I am told they can not. I have been on hold for over an hour before and was disconnected and had to call again and was connected with a new person. This is ridiculous! I have spent several hours over the past few months on the phone with Yahama. I was on the phone with them 1 hour and 23 minutes tonight. I am attaching all of my statements for the past year. I am not allowed to see any statements before XX/XX/XXXX online.