All perfect
Recently I've placed an order of 20 units plus accessories during a sales promotion. The seller did not want to honour the promotion discount even though the order made through before the promotion ended. I can take screenshots of the AliExpress invoice to prove the order went through and was completed and awaiting for shipment. But the seller decided to not ship the items and let the order expire and proceeded to refund, so that they don't have to honour the promotional discount. Now if I would order the same amount of items again, I would have to pay the seller about +25% more than what I have originally paid. Great way to do business ShiqunTech store!
Also to advise everyone here, the Seller's method to decline the promotional discount is very tricky and sneaky. They did it by Not Shipping the items of a Completed order, then this order automatically enters into Refund process after a predetermined period of time, and in your AliExpress Account, there is no option to submit a Dispute or Complaint to AliExpress. So it's basically the Sellers words against yours.