I agree with Tishie.

I'd send him an email, informing him you're not interested and to simply leave you alone and any further attempts of contacting you will be a waste of his time, as this is the last time you'll ever attend to responding to him.
THEN, if it continues, block/delete him.

What a blowhorn. Some just can't get over themselves, can they?

Lotsa 's...

Shangrala