"Shall I send a courier pigeon? It's 2019 isn't it?"
Do I have to spell it out for you?
Your email didn't work, so try something that will guarantee your message will arrive.
Carrier pigeon? Duh. That won't provide a guarantee.
Aha! A letter via Australia Post, using recorded delivery. That will be a bit slow, but there is every chance it will arrive and its arrival can be verified. If it isn't answered, you will have a different problem.
MLS Price at posting:
0.3¢ Sentiment: Buy Disclosure: Held
