I did a two day study on the 23rd and the 24rd of ...

I did a two day study on the 23rd and the 24rd of November and I have not got paid I call them they don t answer there phone,I went to the facility they told me they can t do anything for me. and on the tenth of December I did another study and I have not get paid I call them no answer and this is about the fourth time this happened to me so I m not doing any more research with them again.