Piano Tuner Or Stalker

Where do you draw the line when you notice that your piano tuner appears to be paying way too much attention to your "piano"? You have had your piano tuned and that should have been that for at least six months yet your tune meister continues to telephone you with suspicious regularity, (like a run on metronome!!) strongly suggesting that he return to your home in order to determine if your "piano" is as it should be. He actually tries to sell you on the need for further tuning; his persitent calls and persuasive telephone messages have left you feeling rather annoyed and defensive to the point that you are on the verge of issuing a terse "tune off" even though you are not usually aggressive or rude when responding to those who are. This piano tuner seems to have overstepped a professional divide that should never be crossed and now it is up to you to make sure that harmony is restored. At least there is no monetary cost involved!!