Youve a no of issues here.
your too trusting of the numbers, If you dont have one, now is the
time to get yourself a micrometer.
The mechanical sort, not the digital vernier type.
Check that the .8mm is in fact .8. Draw plates arnt always what they
say they are.
The .75 might just be .7 or even less.
You wont know where the problem is till you take some measurements.
find some .75 wire using your micrometer. andsee if it goes through
your draw plate.
check its what it says it is.
Re ear holes, Heavy ear pendants need thicker ear wires. which need
the easiest way to do this is to make TAPERED ear wires. The wearer
moves them along a bit every few days. The hole will get bigger
slowly and painlessly.
Use only fine gold or 999 titanium wire. Mirror polished of course.
As a lube olive oil extra virgin works fine. dont use prepared face
creams or moisturisers, many contain Sodium laural sulfate.
An irritant to skin under tension in a stretching ear hole.