Whirlpool please help!

I bought 3 Whirlpool appliances at the same time. Two have given no problem but the dishwasher has never worked well. They are all like new and are not heavily used. I am fed up with technicians coming to fix the problems. I would like Whirlpool to attend to this situation effectively and efficiently. I have emailed the MD twice now with NO response this is not service!