Wow, that's quite the opus! Looking forward to seeing what sort of response you get. I bought directly from Three but still unhappy about having the branding and the crappy apps foisted on me, not really much room to complain though.
I'm loving mine. I'm not an audiophile by any means but coming from a decent pair of £100 RHA in-ears the sound is a good step up. Hot ears in the weather we've been having though!
The tracking was hopeless for me, while it said my parcel was at the delivery centre in York the driver was pushing a card through my door to say I'd missed delivery!
I'd give Huawei a call, they've been really helpful to anyone that has.