When Bitkub switched my trading off last year as a foreigner I moved my funds out. This month they offered via mobile app to accept new KYC docs and this was simply a photo of pp (which they had already) and a selfie in three directions! That was all, then wait for them two weeks to approve which they did - giving me 100THB trading fees credit.
I still only have 2 baht in the account and it will probably stay that way.