I don't wish to twist the blade too much but from my own experience Deans have been less than co-operative in the past. Even to the point of "staff" being rather offhand at the International Model Boat Show a few years back. I heard a rumour that the business was up for sale in the past year or so but still continuing at the moment I understand.
Very sad because they have a nice range of products.

Many years ago I purchased some resin parts for a model boat I was building, when they arrived they were still sticky and had the firmness of a wine gum. Most were deformed. I phoned up the factory and was told that Ron Dean was away at a trade show in Germany. I asked for a replacement or a refund and was told to F*** off. The following week I again phoned up to complain to R Dean. He defended his worker and implied that I was at fault however he would send some replacements. When they came they were nearly as bad as the originals. The most annoying thing is that I could make the parts much better myself. I had assumed that so called "professionally" made would be better than mine.
I learnt some valuable lessons that day
1. is look before you spend serious cash and
2. I won't ever buy from Deans Marine again.

Yes I have ordered bits that never tuned up and when tried to get refund said they didnt get order funny they took the money once bitten and all that

Not in total defense of Dean's, who have been in business for many years, however once z parcel leaves their door, it is out of their control for delivery have noticed many times where simple deliveries get routed all over the country because of mail processing and travel scheduling.
After you would receive your refund, would you be returning the plans back to Dean's on your postage coin? I know many time when I am shipping parts or plans, often it takes two weeks or longer, here in Canada.
My thoughts would be to wait at least one month, hoping it does arrive for you.
Cheers

Thanks for the posts, I will be giving Deans Marine some “excellent “ write ups were ever I can. People like this do not deserve to be in business.😔

Unfortunately I had abusive language from Mr Dean some years ago when I queried a refund issue so I no longer use his services

I saw on another forum that there is a fake Deans Marine page out there that is scamming people.