Waiting almost 2 months for a refund. Terrible service dyson uk

I am having exactly the same experience.  I mistakenly ordered two vacuums when the system went down.  Contacted customer services as soon as I realised and asked to cancel one order but that wasn’t possible.  Told to refuse to accept one machine from delivery company.  Only one turned up with Parcelforce so rang again and told other would come with DPD but didn’t know when.  Nothing turned up so rang again and told that machine was out of stock.  Asked to cancel as out of stock but no - impossible.  Couple of days later Parcelforce turned up with machine so told them to return to Dyson as I had been instructed. This was 9th November.  Since then I have rung every few days and talked to LiveChat too.  I have had two case numbers and one complaint number.  Lots of promises that all is sorted, assorted time frames given between 3 days and 10 days before I will receive refund. It’s now December, I haven’t had promised emails from ‘back office’ or any money back.  It’s a nightmare.  I’ve had to pay for two machines at enormous expense and am in despair.  There’s just no one I can contact to be able to sort this out for me