Those are just the costs for you to sue ($5) and potentially what the company will lose ($30). You need to factor in that bringing a court case costs the taxpayer some amount of money as well which is presumably more than $35 to hear the case.
The usual way to deal with a $30 fee that wasn't valid in my experience is request a chargeback on your credit card and dare the company to come get it from you. That works often enough that court isn't really necessary IMO.