9-weeks (and counting) to repair a dishwasher

We logged a call to repair our Whirlpool 6th Sense Built-In Dishwasher on the 18th of May 2015 and since then we have had NO feedback or progress from Whirlpool. I phone weekly and the standard response is that they are waiting for spares but can't give an ETA. I have requested to speak to the Technician and the Supervisor and the standard response has been that they are not available and that they will call me back - which to this day has not happened. I have never in my life experienced such abysmal service!