Dear Nong,
As per talked on OCS, you are the key person for arvato contact window.
(1) Please provide the training schedule and training course by today.
(2) Check with arvato who will attend the course and make sure relative contact window understand what ASUS request on each stage.
(3) Please ask them provide the work flow chart and TAT on each stage.
(4) Daily update open issue till everything works normal.