A tool for managing user identities, credentials, and access across on-premises and cloud environments
Normally you can see anything you've supposedly purchased from within your Microsoft account (or Azure account if it's a business) and directly make changes to these there.
However, since you said nothing about this, do you even have an account or are these charges against a credit or other card you don't believe you've ever registered with Microsoft?
If it's the latter, then your card data has been breached and you should be talking to your bank instead, getting the card involved cancelled by telling the bank it has been involved in billing fraud.
Microsoft can do nothing about this type of credit card billing fraud even if you do reach them directly, since you can't start the internal investigation that's required as an individual, only the bank and card companies involved in issuing the card can do this and Microsoft already has appropriate channels set up with them as a merchant in order to handle such issues quickly and efficiently.
I had a similar instance of debit card fraud a few years ago where someone managed to get my card info, I still don't know how and abused it to buy something at Amazon which they could quickly resell. Since I was notified by my card alerts within probably seconds of the transaction, I went online, found it there and called my bank that issued the card within minutes, described the fraudulent transaction, and confirmed I wanted the card cancelled, while other processes were beginning in the background to notify the bank's card fraud department, etc.
My bank had credited the lost cash to me within a day or two and only a few months later did the bank send me an email that they'd completed their investigation, with the conclusion that the breach wasn't my fault and thus the credited cash was mine to keep.
The point here is that I knew I had never registered that debit card with Amazon, only a credit card from the same bank, so it was obviously stolen debit card details which only my bank could investigate, not me with Amazon even though I'm their customer using my credit card.
So, make that determination first, since you're wasting your time trying to contact Microsoft if this is card fraud which since you didn't even mention an account, seems likely.
Rob