I had a lady call me from the yellow pages wanting an estimate on doing a really small mulching job. About 6 bags. She accepted it right then. I mistakingly never had her sign a contract. I did the job two weeks ago now she says that she never hired me, she couldn't find my number in the yellow pages to respond to my past due letter and that she is not ever the owner of the home. she goes on and on. I'm writing a letter now telling her to pay within 10 days or I send it to collections or I go and take the mulch back. Anything I should do differently? Thanks!!