I also got cheated by malgus, I applied for the apptitude test during the summer,paid my £150 , a few days later I recieved an email saying that I was confirmed for a test on the 17th of August so I went and booked my flights from Ireland to London which cost me a bomb and also booked a hotel then three weeks later I recived a letter in the post saying that I was confirmed for a test on the 30th of August. I booked for the 17th got an email saying your test date is the 17th but then the letter said that it was on the 30th. I contacted malgus but all they said that there was a problem with the location and had to change it. They wouldn't refund my money.
I would advise anyone to stay well clear of them!
Edited to remove a comment that may breach legal guidelines