Step 1: Go here: https://mapsconnect.apple.com/
Step 2: Either sign in with your Apple ID or create a new one using the provided link
Step 3: Do a search for your business
Step 4: If it exists claim it and update the information. If it does not then register it with correct info
Step 5: Verify. It could take up to a week for Apple to respond by email to confirm your business has been verified.