Allie,
As far users reported here, the 5000 quota of 2015 PGP applications were filled on first 2 days (Jan 2 and Jan 5). Any application reaching CIC-Mississauga after 12 pm (noon) on Jan 5 were not accepted and later returned. Those of us who were lucky enough to be accepted received AOR via email and/or E-Cas after few months. No updates after that.
If your application reached CPC-M on Jan 14, 2015, it's most likely that it wasn't accepted. Was your payment accepted (like credit card/bank draft charged? Payment charge by CIC is an initial sign of application acceptance. If your app was not accepted, you should focus on 2016 PGP and try to reach CPC-M on first day PGP re-opens.