repeat help

I'm running into some issues with how repeats and playback are working in my score. MuseScore isn't playing things back the way I want it to, and I'm not sure what I'm doing wrong.

Here's what I'm trying to achieve: from measure 3 to 6, I want that section to repeat two times (so it plays three times total). After that, it should continue playing through to measure 18. Once it reaches measure 18, it should go back to measure 7 and continue until it hits measure 19. From there, it should play through the entire piece normally until it reaches measure 39. When it gets to measure 39, I want it to continue playing straight through measure 40 and then finish the piece normally from there.

I've tried using repeat signs and various jump instructions, but I can't seem to get it to follow this playback route correctly. Any advice on how to set this up properly, or if it's even possible in MuseScore, would be greatly appreciated.