I was composing this comment when Clive has beaten me to it , but ill post it any way,
Very few if any caravan manufacturers have had to undertake a large scale back to factory recall, and they are not really set up for it.
Such a process is always going to be inconvenient for customers, but you can be assured that the manufacture will have explored all other options to avoid such a disruption to their factories. Consequently its also probably new ground for the manufacturer too.
Usually when a recall is required, the manufacturer relies on their dealer network to handle the actual work at the dealers premises. A return to factory recall is a much bigger affair and will be a quite a complex logistical process to manage. It's quite likely the process outlined may not have been fully tested in real life, and may well have thrown up some unforeseen difficulties.
What is important though, is to look at exactly what the published procedures are, and to ensure that you have followed them, and not tried to circumvent them.