not sure what the problem is mate from the pics.
might need a bit more info, if that's okay ...
are there any eggs or bugs on the leaves - you might need a 30x microscope to really have a look, but a 10x might do the trick?
not sure what is in the 'NoTill Compost Mix' ... do they label the components and the ratios?
what components did you get from bunnings ... peat, scoria?
was the peat hydrated before mixing?
just wondering if you are doing any preventative pest management ... like neem sprays?
what type of water are you using?
sorry i can't be more helpful mate, but the above might help to work out the problem and maybe a solution.
edit ... found the 'NoTill Compost Mix'
Edited by pug1010, 10 October 2019 - 12:42 PM.