We sign contract in ...

We sign contract in November we started to work in December but we dint get paid for December the reason why we don't know and now we still clock for January but us who started in December let's say me I didn't get paid but I do signed the contract they told us to get paid on the 18th then they said on the 23 till now I didn't enjoy my Christmas so I just want to know when they will able to pay me for December cause now is January I'm not sure if January I will also get paid this is painful