If you completed the tax return using the TurboTax online editions then you used the TurboTax tax preparation software. The TurboTax account fees are based on your usage of the online editions.
You will have to contact TurboTax support for assistance. Use the key words Billing Issue
See this TurboTax support FAQ for contacting support - https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/turbotax-phone-number/L0Od33nMQ_US_en_US?uid=lfgviwbm