I did want it but now i cant afford to pay the vat so what will happen ? If i refuse them they will go back and then what. Be on loss with what i paid on them ?
If you are in a country you owe vat... I would guess yes they are going to make you pay for that before receiving them. I'm not saying your situation does not suck it does.
You might need to deal with your "client" and see if you can make a deal. Or find a way to get the VAT money on short term loan from someone and sell enough miners that you can pay back people you borrowed for vat. (Be very careful though make sure you can pay them back I'm in no way saying get a loan if you are not sure you can pay back)