Prepare yourself for a long day of testing and interviews but if you make it through you have a very good chance of getting a job! You will typically start with a phone interview then if you pass that you will go onto a computer test, another test and then a couple 1:1 or 1:2 interviews.

Computer test....Then Phone interview.....Then computer test at center....Then a face to face interview....Then Mock phone test in a office room with desk and they call you and you take calls from paper work after they give you 30 min to review and then they test how well you handle calls and give confident answers.....it can be wrong as long as your confident they mainly test to see how well you sound on the phone.