Client find out I cancelled his contract on Upwork

I cancelled a client contract in Upwork after repetitive disagreements and fighting… he is going crazy and now is threatening to sue me and upwork…. https://preview.redd.it/9jw5d3ngm3v81.jpg?width=1168&format=pjpg&auto=webp&s=10904ce656bf19e2f3806b8e86194a6321fc6045 https://preview.redd.it/groxcl9em3v81.jpg?width=1146&format=pjpg&auto=webp&s=57f0e688e80e001d7a569161c1fc831f2fcc8514