Incredibly useless service for over a year

Since I bought my car early last year in 2015, brand new from Ford I have had useless services and help from Ford financial services. Every month I get an account with ONLY my name on it and the amount owing. No account number. No interest rate. No break down of funds owing. EVERY month I sit on the phone for about 45 minutes explaining the SAME problem to a different person who promises to log a complaint and sort the problem out. Lo and behold it's a new month and I still have the same useless account. Going to start looking for a new service provider.