The steps provided above generally only apply to iOS devices. For Android devices, you are required to log into a Map Store Account before any purchases can be made. I checked the email you provided and there are indeed several purchases linked to that account. To access those maps, please open the app, tap on the head/bust icon at the top of the My Maps tab, and log into your account. Once logged in, you should see all your previously purchased maps listed and available to download.
Please let me know if you have any further questions!