First of all, thank you for reporting your error. Checking if a place already exists before to add it to Maps is always the golden rule, I hope you now understand this fundamental step.
Can you please describe the steps to mark a place as “wrong information”? I am not sure to understand what you did.
Are all your places already approved or is the status of the changes shown as “pending”?
In the second case you have to wait, hopefully they will not be approved.
In the first case, in Suggest edits or closure of a place you will find all the procedures to close/merge/remove a place from Google Maps.
However, I personally don’t think that the procedure will work for you, because you added the places, so trying to remove your own edit is something that the algorithm probably will not accept.
The best way to report this kind of mistakes is the Google Maps Help Community , because they are focused on Google Maps, while Local Guides Connect is focused on the Local Guides Program.
Also make sure to share with them the link of every place.
As @ErmesT provided you with a detailed valid answer to your query, I will accept his comment as a solution. This means that if someone else has a similar doubt, the information can be found easier. You can read more about solutions on Connect in this article.
They are not places, rather street addresses so the procedure to report a place for removal would not work.
There is no procedure to remove duplicate street addresses, at least I cannot find any, so your best option would be to ask for help in the Maps help community as @ErmesT suggested.
