The last three dealings with Thai Post:
1 I sent a very important letter (about my pensions); paid a lady; got sticker; noted the place closed down three days after; letter never arrived.
2 Awaited Car Insurance policy which had to be 'signed' for. Tracking number showed the letter never moved for over six days; then two more days. Insurance agent phoned a number of times on my behalf. It took 14 days to travel 140 kilometres = 10 kms a day which I could probably manage on foot even at my age. It eventually appeared, quietly dropped in my mail box; unsigned for after days of not daring to go shopping.
3 Previous year the delivery lady 'lost' the the packaged policy and I went a year with only a downloaded copy.