Sent me a mail that i have to pay biut don't know

I went on their website because I recive a letter from lawyers that i needed to pay a loan, i did not app**** but I got feedback From them by a lawyers thatbi have to pay and saying I must pay R599 for registering on their site or they will black list me, then a day after I get a second email from lawyers saying that I have been handed over I need to pay R599 emmidietly, Loan Hub never responded to that was full in by me or a application sent by me or even contacted me they never even helped me to get a loan as I never need a loan. I demand them to cancel what ever amount they say I am owing to the as I am not owing anything and that must be done as soon as possible, they are ***** and they try to get money from people in a very wrong way, inact the they must be stopped emmidietly..