Incorrect order amounts / cashback

I recently ordered a keyboard from Aliexpress on November 28th, as well as a NordVPN membership on the 29th (during the 100% cashback promotion). I used the browser extension for the former and the Rakuten app for the latter.

According to the Aliexpress receipt, the keyboard's pre-tax subtotal was $49.97 (assuming the $0.25 coins discount applied), with the post-tax total coming out to $52.97.

For the NordVPN membership, I paid $80.73 pre-tax, and $85.57 post-tax.

Despite this, when both orders were tracked - both total amounts were incorrect. The Aliexpress total amount was listed as $40.18, while the NordVPN total amount was listed as $80.00. Neither amount was accurate to the actual totals from the receipts.

I contacted support starting on November 28th after I noticed these issues starting to pop up, but I was then referred to a specialist who stated that "the eligible portion of this order has been credited". I am still waiting for a response after sending a follow-up email with screenshots.

I'm willing to wait a week or two to hopefully get this resolved, but I'm wondering if things will end up changing at all.