Very bad customer service

I Have purchased a brand new Tuk-Tuk three wheeler in October 2014 and clearly stated my expectations for the vehicle. Upon delivery i have found numerous rust areas. Since then a faulty windscreen rubber, engine that's consumption is 21km/l instead of 35km/l, fried electrical system. Above mentioned is supposed to be under warranty, but the dealer principal does not want to fix it, or just has ridiculous excuses for not being able to fix the problems. The dealership has a very very poor customer service, and it seems that they are keen to get you money when buying the vehicle, but after that, they are not interested!