Best Buy is hosting a midnight sale for last-minute holiday shopping, but some consumers are complaining their Black Friday orders are still unfulfilled, having been cancelled or still never shipped out just days before Christmas.

The midnight sale will be Thursday only beginning at 12 a.m. ET (9 p.m. PT) online only, when the special sale prices will be officially revealed. Once the sale prices are announced at midnight, shoppers can indulge in the special deals until Friday at 8 a.m. ET (5 a.m. PT).

So far, Best Buy has announced seven early price reveals, which include: An RCA 42 Class Plasma HDTV for $399.99, an HP laptop for $379.99, a Kobo Touch for $69.99, free smartphones, an LG HEPA Vacuum $299.99, a Sony In-Dash CD Deck for $54.99 and Christmas music albums for $7.99 each.

However, the same comes just days after consumers complained that Best Buy, the U.S.'s biggest electronics retailer, had not fulfilled their orders placed online as far back as Black Friday. According to Best Buy, some orders were cancelled in the days before Christmas because of overwhelming demand.

Due to overwhelming demand of hot product offerings on BestBuy.com during the November and December time period, we have encountered a situation that has affected redemption of some of our customers' online orders, Best Buy said in an emailed statement to FOX 9 News. We are very sorry for the inconvenience this has caused and we have notified the affected customers.

A Best Buy official told the Financial Times that certain manufacturers never delivered products in a timely fashion, which means there was no inventory for consumers demanding in high volumes. The incident comes the same year Best Buy altered its online strategy to compete with online retail heavy-hitters like Amazon.

Best Buy shoppers have taken to a forum to complain about their orders which were cancelled days before Christmas.

One user, JD37857, complained about a Nintendo DSI CL which was expected to be delivered by Dec. 13. The users was told by a customer service representative that Best Buy was out of stock of the item and they should drive to another store, where it turns out was not in stock there either.

Just today, Community Connecter for Best Buy Corporate representative Brendan responded to JD37857's complaint, along with countless others, personally on the discussion board.

I am really sorry about all the trouble you have had with your order here. I can honestly say I am disappointed in the service you received, Brendan wrote. I can see a case has already been created here at the corporate office and dispatched to the store management. I can also see that your order has been refunded and sent back to the card of purchase. We take these situations very seriously so this should be addressed at the store level with all the parties involved. Again, I am sorry about all the trouble.

Best Buy has not made an official statement of how many customers were affected or had Black Friday orders still unfulfilled. The company, however, reported online revenues up 20 percent from 2012 in its earnings report following the end of the quarter on the day after Black Friday.