Thank you all for the advice.
I received both a response and a refund after my latest PM, so there's no need to take this any further.
I am glad that this thread exists, so that there is some kind of resource and protection (or just a warning) if it's necessary, though.
Hair: LOTS of fine hair, mainly variations of 2 (FIA), now cut into a just-above-the-shoulder layered bob.
Products: MOP C-System Curl Enhancing shampoo
Original Source conditioners for co-washing and conditioning
MOP C-System Curl Defining Cream
Boots clear gel and/or Joico Joiwhip
Joico Curl Activator on the second day.