Poor Bosch service

Disappointed after having a new Bosch Dishwasher delivered to us on the 2 August via insurance claim, only to find it seems to shock you ever so slightly when touching it. We logged a query on the 3 August and received notification that a technician would make contact with us. Today we called to follow up and try and escalate the issue or have another new unit. We were told that they were going to allocate to another technician tomorrow which is totally unacceptable