while wells is a crappy bank that has been fined many times by the government, if the transfer did not go through they would post the detail online. Your comment not valid.
Unless your GF is a homeowner or has a business in Thailand there is no way other then getting a fiance Visa. And you will need at least $75,000 in cash (in the bank...could be more these days) and you must marry must her in 90 days or....forget it.....The immigrtation officers will know in 1 minute what your GF is about.