You can't claim harassment. If you tried to claim something close to harassment, you'd have to prove damages.
All you really have to do get the right judge. The facts don't matter in civil court, the judges just decide based on their own personal opinions for the most part. Unless you live in a place with a high standing legal system, you usually get some bottom of the barrel judge that doesn't care about following the facts. They tend to act more as a charity and judge in favor of the disgruntled customer.