Singapore Official Server - raided by shooting through wall aimbotting

just today, my community metal base got raided by 3 person hacker that shoot through wall and keep getting head shot, and I must empathize THROUGH metal wall, and my friend can see them before getting killed, they are shooting from the mountain that is very far away from the base (only small people seen in top of the mountain), luckily there are no dupe hack anymore so they didn’t totally destroy our base with their C4

have you guys experience this too? its very frustating when getting cheated like this, if we lose in Raid battle then it is OK, but stomped by cheat like this is depressing

what is the best defense you guys can think for cases like this?

and when will next VAC ban wave coming?