Bosch's inability to deal with a technical request

I sent my dishwasher to be repaired through a Bosch accredited service agent, there was an issue with them being able to identify the model so they could get the correct part. They sent photos of the dishwasher, spoke to Bosch numerous times, and received parts that were incorrect, this happened more than once. This issue has been ongoing for over 3 months whereby there has been no resolution

The whole issue relates to the fact that neither Bosch nor the service agent has successfully identified the model and then sent the right part for it to be fixed. I have personally reached out to Bosch numerous times, through calls, email and their website without success.

This is a very unprofessional way of dealing with clients. I am left very frustrated by this whole saga.