How do you get your honor level back

I have been recently banned for 14 days for inting with my friends, and I got my honor level to 0. After I got unbanned and played for about 2 days, it said that I unlocked rewards again, even though when I went to my profile it still said that I am level 0. Can someone explain how you level back up from level 0 to 1, from 1 to 2, and if it is easier than leveling up to level 3. Thank you in advance.
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