Update if anyone is interested.
I got in touch with the seller, AO.com, I explained the whole thing to them and they got in touch with Miele, they came out FOC and repaired it again.
It lasted 6 days before the same error code came up.
Got back onto AO (they’ve been great) and Meile got in touch and aranged to sent their senior engineer out who spent 3 hrs dismantling it, and rebuilt it, replacing a few bits, he’s coming back in the new year to replace the front panel as its blistered underneath. All FOC, so hopefully its sorted.
HE did say unofficialy the washer dryers are s***e tho!