Unable to delete account

Observation:

1. I deleted my account from v2.
2. After #1, I was offered to migrate records into v3 api.
3. To test if deletion in #1 was successful, I went ahead with the migration to v3 steps.
4. New v3 account gets created, which is able to import v2 records. So they were not deleted in #1.
5. I then delete the v3 account.
6. I'm offered to migrate from v2 to v3 again.
7. I go ahead, v3 account is able to load data from v2 account, which I had supposedly deleted in #1.

I've repeated steps 5 - 7 multiple times to confirm.

As the website says info@turtlapp.com is not a support email, I'm asking here what is the process of really deleting the v2 account data ?

Things that I've already tried, without success:

1. Deleting my account in the app.
2. https://turtlapp.com/users/delete/