Yes; the 358, 20:30 to Stranraer from Girvan was removed, however the Ayr to Girvan portion of the specific journey (58 departing Ayr at 19:20) was removed by Stagecoach themselves.
There is also no Scotrail service from Ayr to Girvan between ~18:30 and ~20:30 so there is no alternative form of...