I made a purchase from Prominerz already, but when i try to access my account the website is blocking me and telling me that it recognizes me as a spam posting software.
That's bad if you order already from the site and experience some issue when accessing your account.
I told you earlier that it is safe to buy if you order miner directly to the manufacturer that is why I ask if what miner you are planning to buy because I'd like to help you if where's the safe place to buy for the specific miner you like.
Did you try to contact the support? Let me ask if what payment method you use to pay from prominerz? If you use paypal you can start to dispute your order to reverse the payment.