The person claimed to be "Jason" from a bitcoin company. I have not supplied any of my personal information to any type of business, he began to argue with me when I suggested he is taking advantage of people by trying to scam them and I pointed out this is not how a legitimate company would treat customers. He continued to talk over me and argue with me until I hung up. Sounded like a large call centre operating in the background and the phone call began with the usual long silence while connecting to what I assume is either offshore or an automated dialling system.