How to recover my Windows 10 - Elvin Siew Chun Wai

Hi, I am using Dell Inspiron 3000 with windows 10 OS. Due to security reasons, I have locked the drive partition. one day, I had seen that blue screen on my laptop and showing some error message. Now I want my Windows OS, it needs a recovery key of BitLocker & I have not any key. When I logged in my Microsoft account, it is showing account is suspended. What can I do now?

Please Reply asap & thanks in advance.

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Elvin Siew Chun Wai