Unauthorized subscription to Google Cloud using my credit card 15k$

I would like to report an unauthorized subscription to Google Cloud as a result of which I was charged for 15k $ based on invoice. I send mail to google-cloud-compliance@google.com and now I am waiting for response. I have not slept well this night so nervous about this I ask google to cancel this subscription and cancel the charges as soon as possible. I had a credit card (with a max debit of 500$ = 2,000PLN) connected with the Google Account On March 7, 2020, an unauthorized person broke into my google account and using my credit card bought a paid subscription (access) to Google Cloud Platform, he created some additional payed activities (listed on the invoice) I have not received any notification about the start of the subscription, card payment or access information at the address. The scammer has marked all messages from this platform as spam. That's why I didn't see the notifications and I wasn't aware of the whole process

On March 30, I received an email from Google saying that Google suspends the possibility of making payments for products and services using this account. As I didn't make any weird purchases with this card on Google portals, I ignored this message

On April 1, I received an invoice for March for 15k $ = 65,131.19 PLN(attachment invoice) Today, on April 1, I restricted my credit card at the bank, I also reported unauthorized subscriptions to Google. Unfortunately, this can only be done by electronic means and not by phone. Thus, I have no confirmation that someone will take care of this matter. I am afraid of issuing another incorrect invoice. I also can't disconnect a credit card from a google account. This is blocked by Google.

To prevent further unauthorized movements, I also changed the password to the google account to which the credit card was attached and reserved the card itself in the bank. I already opened to claim for this unauthorized payment. Please help