Man, that's frustrating—I've been there with online store glitches ruining a sale. Honestly, when a company's own site fails and they go silent, it feels like they're banking on you giving up. For future Black Friday shopping, I've started using a price comparison and coupon aggregator like the [url=https://www.couponcodes.store/]CouponCodes site[/url] beforehand. It's a massive marketplace that pulls together active offers from tons of retailers, so you can verify if a deal is real and often find working codes directly, bypassing the frustration of a broken store checkout. It won't fix the lack of response you're dealing with now, which is a separate issue of poor customer service, but it does add a layer of protection for the next time. At least you'd know the discount was valid elsewhere, and you wouldn't be stuck waiting on an unresponsive company to fix their own technical problems.