Are you sure there is a penalty?

https://www.investopedia.com/what-to-do-if-you-contribute-too-much-to-your-roth-ira-4770686

"1. Withdraw Your Excess Contributions

You won't face any penalties if you simply withdraw your excess contribution—plus any income it has earned in the meantime—by the due date for your tax return, including extensions. You will, however, have to include the earnings portion in your taxable income for the year."

Because some of the points here are conflicting, I can only give resources for you to read, so that you evaluate what applies specifically. Specifically, a recharacterization is not a corrective distribution of excess, and a distribution is not a recharacterization.

I really like investopedia articles, since they are plainly written. All of the IRA brokerages provide similar info to the consumer, though.

I would not trust what Fidelity told you, if you didn't state it properly for the situation. Even when you are able to explain what happened, they still can get it wrong. I have a client who got an apology gift from Schwab for how badly they screwed up some IRA and inheritance issues. It still isn't right, but I'll let the IRS take it up with Schwab directly, if that ever comes up.