Hi Trevor,
I have had two deposits refunded to myself by Naples Air Center.
The first one was when they had a month or so downtime early last year. They were very prompt in returning my deposit.
The second return was in August last year. They refunded my deposit by the end of the week following my return to the UK.
So no problems this end.
Try telephoning them, sometimes emails get lost in their email filter, so you may be best to speak to them, that'll solve any problems.
Best wishes,
Charlie Zulu.