Sorry to hear, suprused they even investigated, worth a shot.Well, as expected BMW are going to do .... nothing so I'll be sorting it out myself (or getting someone else to do it). I've talked (messaged) @Martyn Scott to death and lily going to him to get the work done but not sure to what extent yet.
Look on the bright side, while it's there with Martyn maybe he can do a quick engine swap, he has some form: