Looking for help regarding a purchase through the Hifiman store on AliExpress.

Hi, so I ordered a pair of headphones on a sale a couple days ago, in particular I ordered the Edition XS' through the official Hifiman store, I paid $285 AUD ($308 before coupons), which was a very good deal, and I figured was safe, once again considering it is the official seller. Anyways, fast forward to today, and I noticed the package still hadn't been sent out, I contacted the store and they said they arranged shipment today. Fast forward about 5 hours and I receive an email stating:

Dear Customer,

Thank you for placing Order ########## (Censored this, so no one can possibly hijack the order) with us via AliExpress.

Regarding your order, the following situation has occurred: Due to platform inventory issues, your order cannot be delivered on time. Could you please cancel your AliExpress order and then reorder the same item through Amazon?

Shipping through Amazon will be faster, and we will extend your warranty period for another 6 months.

Looking forward to your reply.

Best regards,

HIFIMAN Team

I am confused on what to do, it's $450 AUD on amazon, a near $200 price jump, I can't afford this and I feel this is pretty unfair, considering I already paid them the money, for a price they listed and they even told me they would ship it. Now I am being told to cancel it on my end, assuming so they don't get a penalty from AliExpress...