If you have an agreement with your neighbor where services were exchanged between you both as a thing of value and payment where your neighbor supposedly did not live up to her part of the bargin, you should do the following:1. write her a letter demanding payment for the actual monies spent by you above the orignal agreement by a certain date. It is not write that you had to pay out of your own pocket monies for items that were part of her obligation to you.2. if she does not pay you the extra amont that you expended by the demand date, then your option is small claims court.As to the changes in the agreement made by the neighbor a year later, if you did not sign the document presented you after the changes were made by her, it is not binding upon you.