So, I worked for this lady for two months and she was kinda shady. I did a clean up on her yard and made her pay cash for the dump fees and labor. But, I billed her for the monthly yard maintenance. After two months she told me she hired another gardener who was cheaper, I told her I still had not received my money from the previous month and that was the end of the second month already...so she had another bill coming. She said she never received it and to send another. I have in total sent 5 bills, and it has been 2 months since I last worked for her. I believe that she is rents her house. She only owes 260.00 plus late fees...But...thats still a little chunk of change. I have never had anyone that wouldn't pay their bill. She changed her phone number and will NOT answer the door when I come by, whether she is there or not, I do not know, but I've been there 4 times. What should I do?