Can't turn off automatic subscription renewal

Hello,
I can’t turn off my automatic subscription renewal. I’ve set my debit card informations and I’m currently using 30 day trial version. I don’t want to continue subscription after 30 days trial end so I wanted to turn off automatic renewal, but after turning it off in my Unity ID panel and clicking “save” I’m getting this error:
“We’re sorry, but something went wrong.
We’ve been notified about this issue and we’ll take a look at it shortly.”

@arzezniczak: I can’t find the cancel auto renewal option. Please could you help?