First try to get into Producteev, then when you are in, you can delete your account yourself. I recommend doing this from the web interface to Producteev.
I have the exact same problem as Rahul.
I go to: https://www.producteev.com/settings/profile - Click Delete my account. Enter my password and it informs me that my password is incorrect. The password is correct, because I'm using 1Password and I'm copying and pasting the password.
How can I delete my account?