This is the way I dealt with (I think) the same problem you have:
To add an address to Google Maps using your mobile, please enter the address in the search bar.
Swipe up the address information that appears at the bottom of your screen - you might have to move the screen up a few times, until you see "Report a problem".
Click on "Report a problem" and fill out the details on the screen and move the marker on the Map to the correct location, if necessary.
You will receive an email after submitting the edit request. It will say "Thank you for adding an address to Google Maps! The address is being reviewed. We'll let you know once the changes are published."
Please KEEP this email as you might need it later if the edit is not approved after one month, or if it is incorrectly denied.
To check the status of your edit go to Your Contributions, then click on Edits. You can then scroll down and see the current status of your edits. If your report is still "Pending" after one month, or "Not Applied" please post again with a screenshot of the email, mentioned above, and we will advise the next step.
It took about three days for my correct address to appear at the correct location and after that I didn't have a problem.