cam wont fit

A ball hone will do just that (see above) only quicker.

Questions:

Did the machine shop have your cam when they installed the cam bearings?

Did you pay for just installation of the bearings?

Did you pay for the fitting of the cam bearings to YOUR cam?

Answer those, so the lynch mob can retreat.

PS it takes less time to hone/scrap and fit than to post on the internet....