Write a letter if a discussion does not solve the matter.  Describe the
facts and the settlement (action or payment) you feel is reasonable.
Include a date by which you seek a response.  A reasonable letter may
encourage the other side. Remember that the letter may be used as
evidence if the case goes to court.

Dispute resolution centers have been established in almost all states.
The American Bar Association's Section on Dispute Resolution estimates
that there are currently more than 450 community dispute resolution
centers and more than 1,200 court- related dispute resolution programs
throughout the country. While the centers vary, most specialize in
helping to resolve problems in the areas of consumer complaints,
landlord/tenant disputes, and disagreements between neighbors or family
members. The names, services, and fees (if any) of the centers vary from
place to place, but they generally use two different processes to
resolve problems: mediation and arbitration. Mediation involves a
neutral person who assists the two sides to discuss their differences
and possibly reach an agreement. In an arbitration, the neutral third
party conducts a more formal process and makes a decision (usually
written) after listening to both sides. When both parties are agreeable,
using a dispute resolution center (sometimes called a community justice
center) or a private mediation center can be a low-cost alternative to
bringing a suit in court or hiring an attorney to represent you in a
negotiation. In some areas, the court itself may refer certain types of
cases to a mediation program.