I would give it a week or so to respond to gather your thoughts.
I would focus less on your reaction and where to place him & redirect that energy into yourself.
I think you need to explore why you were in a situationship for 12 months and why you didn’t think you were worthy of more. I’m assuming you wanted more.
The voice note isn’t disrespectful but so is expecting intimacy with a woman without exclusivity and all the things you deserve.
I think you should focus less on the reaction because it changes nothing & really makes no difference. I’d be angry too but I think he was disrespecting you long before the voice note.
I really hope you’re okay and realise that people disrespect you because people are disrespectful, not because you’re not worth more.
I’d be focusing on myself, buying books on attachment, relationships, therapy, exercise, facials, hair, and planning your launch into the world of men who will love and cherish you xoxoxooxo
I guess For what it’s worth don’t block or emoji.
“I’m surprised that you would end things with a voice mail and find it disrespectful and not very brave. I did wish to remain friends but my feelings of your character and my trust is now in question. I’m going to take some time to focus on myself and I’ll let you know about the friendship offer, for now I’d like some space.”