Dyson agreed to swap machine as faulty part not in service, great I think…. I don’t even no where to begin but think the problem lies with the lack of training some service reps must be being given and not the full grasp of English.  Tracked replacement only to have it being returned to Dyson before out for delivery.  Customer service rep was adamant it was because they had wrong email address and so dpd didn’t receive reply to an email they would have sent me, not sure about that one but I noticed on the tracker details it didn’t have full address, missing the street name and felt that may have been the reason, service rep would not update address and hung up.   
I asked on call to speak to a supervisor and was refused.  Anyone no how I can escalate my complaint? Think if I email customer service it will be to the same people and I’ll get nowhere.