As far as I can tell from a Google search and from Wikipedia, ozone depletion, especially in the southern hemisphere, was discovered in the 70s.
Was there a skeptic reaction to the evidence, e.g. whether the changes were caused by man, and what the consequences of the depletion of ozone would be?
Was there a difference in reaction between the Soviet union states and the west?
Yes, there was, and it was in many cases amplified by the very same PR agencies and think tanks that have been active in denying climate science more lately.
The standard history here is Oreskes & Conway's Merchants of Doubt, and I've written a short summary in a previous thread here: