Nat it certainly sounds as if it is a film fault that worth contact with Rollei. I have no idea how you do this unfortunately. As I understand matters the origins of Rollei in terms of exactly who they are and who makes the film is shrouded in a bit of mystery
I come across Rollei threads on Photrio but if it has been made clear exactly who or what Rollei is then this has escaped. Maybe I wasn't paying enough attention
If you do start a quest let us know how you get on
Thanks
Mike