If there is nothing in your student ‘My 11+’ account, it most probably means that those 4 tests have not actually been assigned. There would have needed to be enough credits in the tutor account (to pay for them) to assign them otherwise, although chosen, it would not have happened.
It is also possible that you haven’t yet found those tests in your account – there may be more than one page of your assigned tests… have a careful look.
Please ask you tutor to check that they are shown as assigned in his/her tutor account – there will be a small screen icon against them if they are. If they are not assigned then they can easily be – ready for you to do 🙂