If all else fails (no refund, no date change, no company reimbursement, etc.), then just do a MR - use the company's ticket to go to HKG and back to LHR and accumulate RDM and EQM. Sounds like free RDM and EQM since the company pays for the trip. Then start out your HKT trip fresh. The deeply discounted fare probably does not earn you any miles, but at least you get to spend some time enjoying the in-flight entertainment, away from the family, etc. Again, this is based on if none of the alternatives works.