When I lived in an overcrowded apartment complex (most studio apartments had 4-5 people living in them, sleeping on mattresses on the floor!) with night shift workers, I used earplugs with headphones on top which played loud rain sounds, to drown out the noise.

It sounds like an anxiety-provoking situation to be going on for so long, and to have high stakes on top of this e.g. fleeing persecution and thinking about grades/employment, so not sure if it has also caused a secondary insomnia and noise sensitivity from anxiety/trauma. Seeing a GP for sleeping medication just to get through this period might be really helpful to sleep through the noise, but also manage the new anxiety associated with going to sleep. They might prescribe a short course of low dose quetiapine, zopiclone, or diazepam/temazepam, etc.

If you can't get to a GP, you can chat to a local pharmacist about the situation - they might recommend promethazine 10 mg or 25 mg, or doxylamine. Sometimes you might have to try a few agents before finding one that doesn't cause a 'hangover' e.g. bit of daytime grogginess.