I subscribed to Dota Plus on the 1st of this month and wasn't supposed to renew my subscription until 2/1 (as indicated by the in-game client). Today (1/31) I receive an email I was charged for a renewal and when trying to cancel it, the button does nothing. Please fix this and refund the charged month. Thank you

Steps to reproduce:
Open Dota
Click on Dota Plus Shards
Click on Subscription
Click on Cancel. See nothing happens