I've got this senior lady customer who for 2 years now has prepaid for the entire season. (small yard 20 -25 minutes @ $25 x 28 cuts = $700 with no discount given). Last year it rained every 3 days so I cut every week. This year with the drought, I had to skip cutting for 5 straight weeks. She refused to water the lawn but had it fertilized all year (by another service). When the rains came, it grew like crazy (IMO all that accumulated fert kicked in) and I often had to cut it twice to make it look good. By the end of the year I managed to get in 25 of the 28 cuts. Now she's asking me for a refund on the 3 missed cuts (or 3 free snow removals). There was NO contract (will be next year). Every week I stopped at her house but she would tell me not to cut as it was brown and not growing. I tried to offer other yard work for the visit but she didn't need anything (very little gardening required). Lat week I tried to explain my position to her, and she replies "So I can kiss that money goodbye?" If I stand my ground she will probably not use me next year or at least not prepay the season. What would you do?