To contact TurboTax customer service/support use their contact website during business hours. If the problem concerns any type of refund for fees, use the key words billing issues and do Not use the word Refund or you will get a phone number for tax refunds.

Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax

This is a public website.  Return to your post so that you can click those three little blue dots in the upper right and edit your name and account out of the post.  

Is it for the Advantage Auto Renew Plan?   You can sign into your TurboTax Advantage account and under Your Product, select to remove product. Once you remove the recurring product order, the TurboTax Advantage subscription will be cancelled, as well.

How to cancel Turbo Tax Advantage or get a Refund
https://ttlc.intuit.com/community/downgrading/help/how-do-i-cancel-my-turbotax-advantage-subscriptio...

No one can do anything about your account or credit card from this forum. You have to do it yourself. Follow the link you were given.