The connection with between two was purely platonic , respec

I was friends with a married man, he initiated the friendship,it was purely a platonic respectful bond,no videocalls,no frequent calls, just nromal friends ,the friendship was more from there end,he used to pay sadqah for my late father,he always told you can ask any help if needed,so i was very comfortable to seek help financially as i had some issues, now the persons wife is calling me and harassing me and ruining my name on linkedin,She is accusing me of having a affair with her husband.