I can't access my account info for bitlocker id!( My account info can't be access!)

[Windows Server]

Today, I'm just turn on my laptop as usual. Suddenly, the bitlocker pop up. Then, I'm just try to sign in my outlook account to get my bitlocker id. But the thing is, it's say I have to sign in with code that send to my old phone number which is currently disabled (WhatsApp still working), even though I type my password correctly ). Then I'm just follow the instruction use my alternative email to unlock my account info, then it's say I have to wait for 30 days to get my account info?????? But I'm still on school, what should I do.

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