Barclaycard Commercial selection event

Hi everyone, I will have a selection event for Barclaycard commercial next week and was wondering if someone already has been to one cause they did one in December. I know there will be a competency based interview and an aptitute test. I've already wrote HR to ask for clarification on the test but their policy is not to give any specific information. I am mostly scared because I don't know what to expect. Pls if anyone can help with some info, it will be much appreciated. Thanxxxxxxxxxxxx