Do me a favour Tom/Jerry, go to a couple of your corp pages and about 2/3 rds the way down the page you'll see a link for World Market Trading > purchase products and services.
Click this, and if your corps are ordering but not receiving supplies then you'll see a list of stuff they ordered.
If nothing is listed as outstanding then they are not ordering them and I suggest you check the automatic settings yet again.
PT 2
After a re-check of your corps, it seems the problem is getting electric power. Seems very strange when you've set it to buy at 108 or market.
I suggest you get your country to order as much nuclear power as you can in spending limit for a month or two, at immediate, any quality. This will arrive as electric power and is a cheaper way of buying it. Immediate and any quality to get it as fast as you can.
Then when you have some in your country stocks, sell it to your own corps in 'trading with own corps'. It still doesnt explain why you arent getting any in like a dozen corps...
I reckon once you get them supplied first time they will sort themselves out for the future. Strange things can happen in this game.
Hope that helps buddy, no one likes to see someone get bashed repeatedly... NO, WAIT...you're a cartoon right...lols