In nature roaches help break down forest floor debris and recycle the nutrients to the soil
Their excrement is a very rich fertiizer
If you are worried about them getting into your house then use some barrier spray / powder around your house.
If you want a greenish solution then get some running birds ( chickens even ) and they will clean up excess cockroaches in no time flat.
Ground dwelling spiders also like the odd cockkie or 2000
Do some research on cockroaches.
They are a very high benefit insect.
It is just unfortunate that they look so ugly to humans.
When I was a kid my a'hole uncle showed me a trick with cockroaces & huntsman spiders .
He tossed a huntsman into the bath tub and then a couple of cockroaches.
We watched as the cockies desperately tried to get out because it was too light for them
And every time they got to 1 spiders length away from the huntsman it leaped across , stuck its feeding tube into the cockroaches, sucked their inside out then returned to it's original position.
This all happens faster than a human eye can follow.
The idea was to embarass my mother.
However it cured both my sister's fear of both spiders & cockroaches as they now became play things.
And of course at college we used to play cockroach football on the kitchen table .
Excessive amounts of cockroaches shows there is a problem with the way they process their compost.
It is not getting hot enough to kill the cockroach eggs which means it is also not getting hot enough to kill harmful bacteria , other pathogens and more importantly WEED SEEDS .
I would not buy any more compost from them.
Make your own it is very easy to do I make about 50 yards a year using some old compost bins that were throw outs,
I do have to buy in some chicken poop and when the tree munchers are in the area I get them to dump a load of shredded trees out front.
The tree shredings get tossed with fresh horse / cow dung & I relieve myself on the pile .
The more squeemish can buy urea fertilizer.
keeping the pile acid discourages cockies from living there, that like alkaline soils.
Currently I have 9 bins in operation & the compost gets tossed from one to the other.
In summer it takes about 10 days to get to safe mulch state ( brown compost ) and some gets used like that & the rest goes into bigger bins that do not get tossed but i add water and worms to that bin.
In around 3 months that bin is black compost and has been reduced to about 1/3 the volume and that is what goes around the flowers & veggies.
It takes about 3 minutes to toss each bin so around a 1/2 hour of pleasent light work.
made even better by the native birds than come & stand by my legs waiting for curl grubs or cockies that are disturbed during the toss.