Hi there @heng04,
thanks for reaching out !
If you're experiencing odd behavior on your account, please take all the protection steps provided on this help page and on this one as well.
Upon doing so, you will strengthen you account's security level and it should prevent from the same behavior to repeat itself.
However, if the issue persists, you can always create a new account and have all your data transferred following the steps on this Spotify Answer.
Note: you'll loose access to special offers that came with your current account like Hulu for example.
Keep me posted 🙂