Payday loans

I have received calls yesterday and today from a company name Capital Management Solutions saying that I owe a payday loan since the year 2007 in the amount of $255.00, and I need to make arrangements for the payment if I do not do that I will be served with a Subpoena to go to court. Supposedly this debt goes back to early 2007 when I was living in PR and the money was deposited to my bank account in PR and supposedly the did not recover the money from me. I was also informed that they were going to serve the documents in my office today if I did not make any payment today.