That was my dialog almost word for word. On about the 5th time of not responding to my question or request I finally said "are you kidding me with this?" and he actually said "OK, sorry to bother you" and hung up. Hopefully this is just dialing-for-dollars (i.e. random number dialing) and my cell phone is not on a published list now :-(
Your phone has the ability to block numbers. You don't need special apps. Google how do I block calls on your make of phone.You will see a utube video how to.