My account has been locked and I cannot confirm my identity.

Registration date
Wednesday September 11, 2019
Last seen
September 11, 2019
I tried to secure my account through a link I received in my email and then it told me I would receive a code on my phone which I didn't .I tried other ways too.I identified my recent comments but that didn't work as well.And confirming the previously logged in devices is the option I don't know how to use.How can I confirm my identity and recover my account?
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