Booking a week's course

Good morning,
I try to set up the booking for a course that lasts 1 week.
The price is set, the special time period as well. But I have to set the time in minutes (which is ridiculous) and on the website it doesn't show the time period and  it says that no time slot is available.
Could I not have this message "No time slots available" as it is confusing?
And is there a possibility to have a 3-, 4-, 5-days course shown as such?
I'd be very gratefull for any hint, thanks in advance

Hmm

Could you send me link to the page which says No time slots available so that I can take a look at it?

Tuan

Of course, here we go:
www.qrbmc.com/book-an-appointment

It is the tab with ITIL on it.
Plus another question: Since I use the bookingsystem I cannot change colours anymore...
Does this mean anything to you?
"The resource of " www.qrbmc.com/media/co…/css/tabstyle/#033f88.css " was blocked because of a MIME-Type conflict ("text/html") (X-Content-Type-Options: nosniff)."