It takes time: In my view, you should wait a little bit more.
Quote:
If your total unpaid earnings haven't yet reached $100, they'll roll over to the next month and accrue until they meet the $100 threshold.
Payment is disbursed within approximately 30 days of the end of the month — to see the timeline of our payment cycle, read the Payment Timelines section below.
The payment would be processed on December 15, Sent on December 25th and should get to you by 25th Jan and after that you can report to Google about it.
Also check out the Payment History Page after 25th December to see the check issue status as well as shipped amount.