Firstly, we haven't deleted any comments of the War Thunder page that are just critiquing the event.
Secondly, please check the terms of the event and make sure you meet all the criteria:
Its also worth restarting the client entirely after you check.
Beyond that, you will need to provide some evidence of what you are using in battle and the lack of drops for us to be able to action anything further should there be an issue. Just saying "im not getting materials" is not giving us anything to go on.