I know they are scammers. my computer tech support fixed my computer, and this number keeps calling me trying to refund money I paid for three years tech support. The company I work with already optimized my computer, and the number 323-522-5311 wants a credit card number or bank account number. Thank you people just watch out for scammers. don't give out any information s.s.n., credit card, bank account, or any other important information to anyone.