You'll need to submit a ticket here.
https://azure.microsoft.com/en-us/support/create-ticket/
--please don't forget to Accept as answer if the reply is helpful--
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Dear Sir
Yesterday, I have received a email, which said I should payment the bill 423.72 USD. The invoice number is G001846415. I do not know why charged me such money. And in this period, I just used one time, and cost is 2.07USD. The invoice number is G001908826. I think it is unfair for me to charge such money in the bill G001846415. I think Microsoft is great company. and it should use such method to cheat the customers.
You'll need to submit a ticket here.
https://azure.microsoft.com/en-us/support/create-ticket/
--please don't forget to Accept as answer if the reply is helpful--