Myntra.com — somebody else is using an account in my email address.

Address:

Kannur, Kerala, 670306

Hi there,
I am getting notifications in my gmail from myntra about some orders. Thing is that i dont even remember creating a myntra account. Someone else is using an account in my gmail address. I how that is even possible. Now i have downloaded the myntra app and changed the password using my gmail. I dont know if that is enough. My gmail address is [protected]@gmail.com
Please take necessary measures.