Hi Danielle, try the CollectMore app. It's free and the person who created it, Paul Metcalf, is very helpful. I'd email him for advice if the app doesn't work for you. Good luck!
Have used a few but only in extreme situations when we have exercised all efforts and the situation has blown out. By then they have a hard case, so it is difficult to know whether its them or the case which is making their service questionable.