Lilian that has certainly taken its time to be PAT tested - why such a long time, I thought in your earlier post it was to be two weeks and that was back in October. Okay I know we have had two lockdowns since but surely some people must have been working.
With regards to the machine sent back being the wrong one, at least you have photos on here of the one you were interested in - so what is the shop going to do about this? I do hope for your sake that they can find the missing machine and all its bits and bobs.