[mothered]

Basically, ye I thought the constant spamming of myself was completely out of order I am sure company policy does not allow the employee to come to just show up at my house after work hours, He has openly used his confidential work information (My address) to come back in his own time and question me...

It's basically harassment, and you have every right to call the police.

They had no right to keep hounding you with 40+ calls a day.