We will visit them next Monday to discuss ongoing issues and delays in manufacturing and delivery as daily production volume remains low and is of course directly impacting our project.
That was last Friday (or Saturday 29. March GMT+2 time) so they should have been there already, right?
"next" monday is always the following week, so therefore if you are before Sunday, the "next" means the next week that start from the Sunday coming up.
the confusion comes then, what to call "this" Monday...?
that's my understanding anyway and I'm not going to google it