Messages and soagent making CPU spike - any solutions?
I had similar issue after I updated my mid 2012 mac book to Mojave. SOAGENT &amp; CALLEDSERVICES were taking up more than 100% CPU. 

I exported all the contacts to the VCF file format and saved on desktop.
Deleted all the contacts from the contacts list
Restarted computer
Imported back the contacts

My issue was resolved. Hope this helps