If you beat ezekiel, had 2nd sub, then recruited him, they have records of all that. The main issue here is getting someone to actually help by looking back through the records, finding and replacing him. 5 weeks is LONG!!!
It is so frustrating, we all know that, when they won't answer a ticket. Keep trying. If at some point you kill him again, and get sub back - take screenshots!!!!
Then pray that someone might accidently walk into the office and feel like working.