By buying their products you are agreeing to the T&C and thus explicitly agreeing that you are acting as a business and thus "forfeiting" consumer rights.
This is clear in Belgian law (double checked, lawyers & all) but I'm waiting for an answer re EU law (might not be fast).
The Section 75 bit *WOULD* only apply in the UK (and I'm really not sure it would stick - CC phone operators are not exactly in charge of these things and I wouldn't be surprised if their promises/word were discarded by the first judge).
if you say you are a business, you buy business only equipment, to use for a business purpose, then you want to convince your CC company/judge you're a consumer? If it quacks like a duck...
Also, if there was to be a massive refund, it would mean bankrupcy for KNCMINER and thus no money for anyone. Alea jacta est, the only thing you can do now is wait.
Sorry, but you can't be serious that some company T&C can define if I am a business user or not. That is defined by me, not them.
They might as well write: "The Products are sold for Moon use only and Purchaser hereby accepts that it has purchased the Products in order to use them on the moon only."
If I decide to be a business I register with the tax authorities in a certain capacity (self employed person, limited company, etc)
Purchasing a product from a company online does not change my tax status or register me as a business entity 
That's exactly my opinion, too.