I had the same situation and immediately realized that it was not related to SAMSUNG representatives. I deleted all the downloaded apps and cleaned up my phone.
My friend recommended me cryptoinformator.com which is written all the news about cryptocurrencies and much more, so I'm sure that if Samsung did something like this, it would definitely not be left out. And I'm different services and news reports clearly would not miss the news about such a media giant as Samsung. Clearly the problem is in your phone, perhaps it is even used covertly for mining. And in general, I think that the best solution is a hard reset. Let me know how you solve this problem, I would like to know how you solved it in the end. I wish you good luck and hope that you will be able to get rid of this problem.