STOP HARASSING ME WITH UNWANTED PHONE CALLS!

I started receiving phonecalls about 2 or 3 years ago asking me if I am Mr. van Rooyen. The calls would come sporadically once to three times a month. At first I did not make the connection that it is the same company - LGR Incorporated - that is phoning me regarding, what I assume, is an unpaid loan of some sorts from Mr. van Rooyen. Upon realizing what is happening, I explained to them several times that I am not Mr. van Rooyen. In fact, I answer my phone by saying, \Hi