Pattaya: There exists a day-to-day bus that leaves Phuket, travels by means of Bangkok in the wee hours of the morning, and deposits you in Pattaya in the morning. And vice-versa. This removes the trouble of making bus modifications, even bus station changes, in Bangkok. There are various complications, on https://emilianop30ch.suomiblog.com/the-basic-principles-of-adn-574-uncen-48976885