Does a mortgage company have the right to begin collection calls on mortgage payments during the 15 day grace period?

Question Details:

My mortgage company begins calling me for my monthly payment from the 1st through the 15th if I haven't not already scheduled an on-line payment for the month. The calls are from an automated recording, they leave messages, and calls are between 7-12 times a day. I believe this is harassment. What are my rights in GA? Important Notice