Dear ......,
While your frequent correspondence has become a memorable part of my day, as I have previously stated, there is nothing more I can provide you with in this matter.
All your efforts are successfully producing is an excitable work environment.
In turn, this increasingly prolonged period of heightened emotions inspired by you has caused serious delays and impinged productivity within the firm to such an extent, I have been forced to prepare measures to block any further comuniqué.
This includes, but is not limited to, assigning armed guards at your beck and call to disabuse you of the desire to attempt further contact whenever the fancy might strike.
Do not worry about the cost, my firm is wiling to pay 100% of the fees for this invaluable service.
Thank you for your interest, CEO. DM