The quiz you have to do online is really easy - if you fail it, it means you don't know much about customer service, something with M&S is extremely keen on. They don't allow you to resubmit applications within six months otherwise you could just keep on doing the test until you got it right. You did it twice, the second time you got it right. Obviously, something was flagged up on your application, which they noticed, and they matched up your new application to your old application. So whilst your new application made you eligible for interview, as soon as they figured out that you had already failed the test in a previous application, they emailed you to remind you of the fact that you cannot resubmit your application. So no interview for you. If the fact that it says 'interview confirmed' on your new application bothers you and makes you think you have a chance, then as I said before, you need to phone them up and ask because they are the ones personally dealing with your application and can make these kinds of decisions. But the email from them is explicitly telling you that you do not have a chance; "I wish you every success in your future career" is a firm no.