I have 3 withdrawals from Jan 9. Status in Cryptopia is "Complete" but nothing in my wallet. I am running the github wallet v4.2.2.0 (latest version).

Here are the people in this thread reporting deposit or withdrawal issues since Jan 1:
Xdragon - deposits not received on cryptopia Jan 3 (page 75)
DuvajBalone - ditto (page 76)
Sash_lav - ditto (page 76)
Mike1983 - ditto (page 76)
nonny12 - withdrawal not received (page 76)
moonstruck - ditto (page 76)
arielbit - ditto Jan 6 (page 79)
worldwide_wes - ditto Jan 9 (page 79)
khage - ditto Jan 10 (page 80)
benbutton - ditto Jan 7 (page 80)
TTE - ditto Jan 10 (page 80)
chiwalfrm - ditto Jan 9 (page 80)