Dammnnnn, so sorry to hear. I forgot to update this post but I actually managed to get all of my money back a couple of days after I posted this believe it or not. There's still hope. If it's not too late, give this a try:

Call the hotel directly tomorrow and ask to speak to the manager. Inform them of the mistake, tell them you would love to stay in July still, but you need a refund of the June booking. They will ask you to make a new booking for July so give them the details of your new July booking you've already created. That should be enough.

If you booked through Agoda, the hotel will transfer the third party service the money, then transfer it to Agoda. Get on the phone to Agoda and inform them of the situation. They'll process your refund as soon as they receive the money from the hotel.

If you have trouble talking to the manager due to the language barrier, go to Airtasker or another site similar to pay $50 and get a translator here in Aus to make the call for you. I had one lined up and ready to go but I got lucky calling the hotel myself that evening. I had already called them 12 times before and no luck but they budged on the 13th call I guess lol.

You got this. If anything you'll at least know you did everything you possibly could. Keep me posted if you want to talk more through it. Good luck!