What options are available for a Syrian visa applicant facing difficulties in Thailand due to nationality and overstaying?

Robert my syrian friend has had many issues as a syrian passport holder. He was on a valid students visa, then switched to type b work visa from laos. But not before they tried to reject him before he even submitted his docs. before that, KH rejected him also in the same way, before he filled in application form.

Now his situation is urgent, his company misunderstood the law and were caught underpaying him at the last stage of applying for extension of stay. He must leave the country asap and he's already a day overstayed thanks to late requests from the Singburi immigration office.

Is there any oversesa embassy that will be more likely to accept his type B visa application?

Is there any law passed that doesn't accept his nationality?? Returning to Syria is not an option for him.

Any experiences from others with a similar discriminated against nationality?? any ideas or thoughts appreciated.