Hi
Yes this is definitely harrasment , no one needs to call anyone that many times and especially from different numbers . Obviously by calling you from different numbers he expected you to pick up . With my ex abuser at his worst it was 20-30 times a day and like your ex used to use different numbers which I had to keep blocking, it was a nightmare. I had a lot of advice from some ladies on this site at the time which proved invaluable. Hope you ok xx