But what’s great about this is finding new and creative ways to express yourself! “My points fell on rocky ground” — Biblical allusion. “They believed me as if I were Cassandra” - Greek. “My words fell on them like the sun under an umbrella.” If you want to keep the synecdoche, “Their ears weren’t ready to hear me”. There’s opportunities to be really creative and poetic if you’re interested in language as rhetoric!

Colloquially, nobody will blink at “They refused to listen” or “It was like I was talking to a tree”.