Small claims are designed to be quite easy, and almost free. (You might have to spend money on registered mail). Worth it for a gripe. I was prepared to do this for a hotel refund, where they were going to charge 20% cancellation fee where I saw that in local law, while there is no set max fee, it should be just to cover reasonable costs.

I looked into it and while a hassle it is on par with renewing your car insurance level of hassle (so some hassle, but doable, a "side project"). And worth it for the "stick it to the man" factor. In the end I got it almost all back by being nice, so no need.

In addition to small claims, there are credit card charge backs.