Heather,
No its not just you, I too would certainly not be happy with the problem you are describing in a 2007 van.
The only things I could suggest are:
1) contact Baileys direct, I have only needed to contact them once by email and must admit that I received a very speedy response.
2) This is very unlikely but I suppose it could be possible, could there be a water ingress problem in your van? a joint seal faulty somewhere. For all the time it would take I'm sure your dealer wouldn't object to doing a damp check to rule this out.
3) Are you a member of one of the two big clubs? Some years ago I had a problem with another manufacturer getting repairs done under warranty. They agreed the repairs were due under warranty out but couldn't/wouldn't give a date for doing it despite numerous phone calls from both my dealer and myself. More out of frustration and perhaps desperation I phoned the Caravan Club to ask their advice. They phoned the manufacture on my behalf, don't know what was said but two days later I had a date for repairs to be done. Worth a try anyway.
Good luck.
Robert