Reports :: Multiple Counts In One Expression?

I have a report that I have called "0 Master". It details the number of complaints that my company has received, broken down by a specific service.

I have a CountIIf that returns the number of complaints received in a certain category. This works - but this only shows the total number of complaints received for that specific category.

That formula is =Count(IIf([Contact Category]="Stage 1 Corporate Complaint",1))

I have also got a formula that tells me the total number of those complaints that are outside of the deadline (regardless of category).

This formula works and is;
=Count(IIf([Date Response Expected]>=Date(),1))

But - I want to combine these 2 formulas to tell me the number of complaints outside the deadline for a particular category - I've had a go myself and anything I do tends to return either nothing or -1

So far, I've tried various incarnations of;
=Count(IIf([Contact Category]="Stage 1 Corporate Complaint",1)) And (IIf([Date Response Expected]>=Date(),1))