Why not try a delapitory cream. Easy to find in pharmacies in Thailand and globally. Some expensive some very cheap. VEET basic good and cheap. Many other brands appear online shopping sites. Good for facial hair and for removing pubic / under arm hair.
For facial hair, shampoo first then apply the cream* and rub it in well, wait 5 or 6 minutes, then remove the excess cream and the dead hair with a small towel / cloth with warm water. For foreigners need to repeat every 3 to 5 days, case by case. All so simple and leaves the skin very smooth.
For pubic hair, shampoo, dry, then use an electric clipper to cut the hair down to perhaps 2 mm, then apply the cream* and rub it in well, wait 5 or 6 minutes, then remove the excess cream and the dead hair with a small towel / cloth with warm water. For foreigners need to repeat every 3 to 5 days approx. All so simple and leaves the skin very smooth.
* Best to not apply more cream than recommended or it will burn the skin and leave dark patches which can take a couple 1 or even 2 weeks to disappear.
Have a professional swimmer in the family, uses basic VEET cream all the time, never had any issues, all done very quickly.
Worth a try. But check prices, VEET basic very inexpensive. VEET (and other brands) which have many additives, vitamins etc., very expensive. Basic does the job well, but not more than recommended.