4TH REPLACEMENT DISHWASHER WITH EQUAL CALL OUTS

I purchased a Bosch dish washer (top of their range) in May 2015<br> This machine has now been replaced three times (I am on my fourth machine)<br> Technical support call outs have totalled 4 to date<br> The latest machine lasted 2.5 months<br> Call out logged 2.5 weeks ago<br> STILL NO RESPONSE and still no machine<br> Now the error report says that I should immediately switch of water and electrical supply and urgently contact technician. WAITING for Bosch to respond whilst the dishes pile up<br> Effectively I have not had a sound working dish washer since the very day I purchased it!!