Spartanoid

Thanks to everyone for your replies, it now works. Most of the things you suggested I did try before I posted, but the fundamental thing I was doing wrong was not having the pen tool selected while joining them so that contextual menu wasn't showing. I was thinking of how I'd do it in illustrator, I drew all the curves with the pen tool, then selected them all with the 'arrow' (move tool, I think), so they were all selected, then went to geometry and merge curves. So that's why it didn't work. It's encouraging how many people replied in such a short time. So many thanks for your help.

Hi, I have a simple shape (attached) I'm trying to fill, but despite all the curves being joined it still fills as though they're individual curves. When I joined the last joint it all lit up as yellow, which I assume means it's one joined profile. I also tried several other methods, like drawing each as individual shaped and using 'Join Curves' but not matter what I do I cant get this shape to fill. I'm trying to make the transition from Illustrator to Affinity Designer but problems like this make the transition very difficult. I ended up using my old MAC version of illustrator to do it. Am I missing something? it shouldn't be this difficult. Test.afdesign