Westlake Financial Services Harrassing Phone Calls - Before my payment is due and I've NEVER been late los angeles, California

I purchased a car with them to help rebuild my credit 5 months ago. Each and every month, they begin to call me on the 10th of the month, even though my payment is not due until the 16th.

I have NEVER paid my payment late. The latest I've ever paid was the 14th. When I answered once, they said they are calling to make sure that I make my payment. WHAT!!! I can't stand this company and I'm in the process of refinancing my loan now (yes, my credit is high enough to do that after just 5 months). I believe that this is harrassment.