jimboy;285436 wrote: TonyBKK, Everyone else appears to be too tactful to point out your mistakes, but please take the following in good faith. In Thailand, the western notion of admitting to a mistake is not current. Without going into vast detail, in crude terms preserving face is of utmost importance.
In English, we often describe something as "bad". In Thai, someone would describe something similar as "a little good". This is one of many social cues. If you want a Thai to co-operate, whatever you do, help them to help you by not referring to any mistake. Instead, try praising the speed of their service, and laugh and say that the wrong tyre arrived. This way, you will get co-operation.
What prompts me to write is your post to a forum where the supplier advertises. Nothing I can imagine could be a worse outcome in Thai culture. My advice is, remove the post. Otherwise you are causing the supplier much worse embarrassment and social shame that you can imagine, and you will not achieve the result you seek. Instead, you will piss of another Thai, and the other Thais who read the post who will side with their brother, and create more Thais who will resent dealing with foreigners.
With the forum post deleted, and some tactful words, you should get the tyres you want. But, if your supplier follows Chinese business practise, it is probably too late for a refund.