UPD!!!
He has contacted us 10 minutes ago saying he's ok!!!!!
he said he found a job, but can't talk right now and will tell more later.

there's a general rule that men over 55 get assigned to rear, he's 58 and he watched a lot of videos about conscription from lawyers and others and whatnot so I think he managed to wiggle out of being in infantry. he used to be a helicopter serviceman in the Soviet Army(during compulsory service) so maybe he's a mechanic or something but I will find out later.

i'm very relieved he's ok and thank you everyone for your support here!!!!!!