How to get support to cancel my account?

I have a subscription that is due to renew next month. I haven't used the software in months, as I also have a PC, so there is no need for me to continue to use the software and haven't for at least 6 months.
I logged into my account, there is no record of any product on it at all. I can use the link in the reminder email to change my subscription, but that only allow me to change the payment method.
I don't use Facebook or Twitter, so how am I supposed to contact support?

 

See this page https://kb.parallels.com/en/123306