Hi Crewella
First and foremost, I hope that you are doing more than just well
In addition to that, thank you for expressing your concerns with an honest way.
Q: There is no list of ingredients on the bottles. There is no mention of nicotine, so I'm guessing there is none.
A: The product contains only flavour. Natura Liquids aren't ready to vape products, which means they don't have any amount of nicotine in it.
Q: In practical terms, this means we are one of the very few eliquid manufacturers that have never had unsavory issues such as problematic batches, inconsistent nicotine amounts, harmful compound scandals or product recalls.
A: So far, we don't sell nicotine boosters in the UK market, but we will in the future.
Q: There is no mention of the PG/VG ratio, there are no instructions.
A: There is on FAQ section a reference for PG/VG ratio, also there is a reference on each product page individually.
Question 9 -> https://naturaliquids.co.uk/pages/faq
At the end of the description paragraph -> https://naturaliquids.co.uk/products/100ml-coffee-latte-shortfill-e-liquid
Also, we have a mixing table on each product page.
Q: I have one main bottle that I'm guessing has the flavouring, and a second bottle of a clear liquid that I guess I'm supposed to pour into it
A: The package contains two bottles. The first bottle (60ml) contains only the 60VG/40PG flavour and the second one (40ml) contains only pure VG. So you can adjust the amount
of VG according to your needs.
Q: I have emailed for help in getting to the 12mg nicotine 50/50 juice I need
A: You will receive an answer as soon as possible (to your email box) 
We need to do far better with info
Thank you for your sincere feedback
Anna