Worst service ever and refusing to refund Money

Cummins one of the best Engines in the world, but their so called Service is disgusting . One should rather read the reviews before paying them any money . Every review I experienced myself . Most insulting is their refund Department where one has to beg for the refund , but whatever they demand , they still do not refund and come with more excuses and demands , Their staff does not pick up their phones and the emails are answered in a kind of Government Lecture Style . It seems they will never refund and I have to write off their theft . Stay far away from this Company