Wow!! I remember someone on this forum once started that he/she was shortlisted last year but never invited for the test.
Now back to the question, PWC started contacting candidates(thru email and text) between 25th May to 29th May. The test was conducted on Friday, June 4th too. This forum was also updated with the PWC application process by fellow posters. I guess it's either you did not check social forums like this one or or network with people during this period that is why you were unaware.