First...
CAT A = Mechanic
CAT B = Technician
Take your query to the QA manager or a QA engineer and state how long you've worked without OJT supervision. They SHOULD sort you out.
In the meantime, make sure you PROPERLY log all your work as you've been told to and make sure that its up to date - make sure that they are the problem - not you!
I don't know how Airbus training works so -
If you can't get a QA official to do the job - see if your Shift Supervisor will? or see the Training Dept.