I have created an script which I can tweak to automate adding users to your group. As you have already them in csv format, I would just need that file and group url to get started.
Relevant Skills and Experience
Expert in telegram automation, javascript, chrome extension
Proposed Milestones
€222 EUR - Adding all users listed to the group
You will have to add me to your group manuall first and make me admin to make this work. I will do rest.