I leave it to you to decide and make your own conclusions.
Some viperatech.com web customers have suggested, expressed based on their experience.
https://www.reviews.io/company-reviews/store/viperatech-comPlease DON'T shop from viperatech.com, use only trusted sites for online shopping as there are many frauds online like this false mining hardware provider. They dont deliver.
Actually there are many websites online, which provide services selling mining devices like ASIC and GPU or the like, it's just that sometimes people are lazy to check about their Reputation is cheating or not.
If,everyone had a little time to look for reviews of sites that provide mining tools, maybe the case like the natural OP wouldn't have happened, for that in the future do research before buying / selling online in any form, to prevent loss of money.