Communication tactics: Debt collection

They call and said I'm looking for blanket and I'm like what the reason not aware the what you talking about don't know how my information was link can you please stop calling me cause this is getting out of hands, then reply by saying I'm a collection agency attempting to collect for a financial company or a unpaid balance you owe and didn't make the rest of your payments .Not sure if you have the right person but don't call me again and asking for my personal information .All year around and different number are codes getting out of hands and taking effect on my credit score.