Phill if you received this email after purchasing the s9k
Thank you very much for your purchase of our products.
You are receiving this email to inform you that we will issue the Actual Transaction Price of Antminer S9k-13.5TH/s(Shipping date: 20-30, Sep. 2019)
Item No. Product Reference Price Actual Transaction Price
Antminer S9k-13.5T 310USD 253USD
Then you most certainly should have been credited the amount of 57$ for each miner, this is what happened to me , but I had to email them tho , and this was their reply
We checked your order and found that the overpaid amount in your S9k order ID 0012019080xxxxxx is 57USD, and it is left in your account as credit.
You can choose to use it in your new orders or refund, thanks.
What you need to do is send them an email with all S9k order numbers and attach a copy of the Email they sent ( the one quoted above) and you will get the credit, if you have a pending payment it will be automatically deducted, if not, then try to place a new order and you will see price drop.