AITA For being Disappointed in Surfshark?

A while back, I sighed up for surfshark with the intention to refund my subscription soon after. I just needed it to access some information I thought was region lock. After I was finished I sent an email to surfshark asking for a refund.

I then received an email that I thought was a confirmation that I would be refined.

However, recently I got an email that my subscription could not be auto-renewed because my account lacked funds (I'm a broke college student).

Their reason for not canceling my account was that they actually wanted another confirmation that I wanted to get a refund.

Is this my fault for not checking back in? I thought it was clear that I didn't want to stay with surfshark.