How long will hair take to grow back after a 0 cut?

The hair salon mistaken when I said shave it all and she didn’t put no guards on clippers and buzzed my whole head. I had very thin hair on top and never had it buzzed just trimmed but this time she did the whole head and I am still in shock and am bald! How long it will take to get a head of hair again? I did... show more The hair salon mistaken when I said shave it all and she didn’t put no guards on clippers and buzzed my whole head. I had very thin hair on top and never had it buzzed just trimmed but this time she did the whole head and I am still in shock and am bald! How long it will take to get a head of hair again? I did purchase Biotin online to maybe hell with the process
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