We cannot edit profile once we receive ITA.Don't decline ITA, it is a precious thing. Just correct the company name.
Quick Update:
I just called my friend who already got his passport stamped. He did the same mistake, but it never mattered. So long as it does not alter the CRS score or something that is related to NOC. It seems the Canadians are lenient enough if they can understand unlike the Australians who are strict with these things!