Hello everyone, I’m traveling to Thailand on 9 September until 3 February (148 days.)
 I will be training and fighting at my sponsored Muay Thai gym. Therefore I will be able to provide supporting documents if necessary. However, I have no idea what visa to apply for and I cannot get a hold of the royalty Embassy in London. I’ve received an email back from them with suggestions of Visa types. However they told me I need to have proof of relationship. I’m confused as I’m 19 and unmarried. I’m also not traveling with a guardian or a spouse so I will not be able to provide marriage documents, ( and I’m not 20+) which I believe is a requirement for the DTV Visa.
My partner is also coming for the same amount of days however she will not be training, so I also have no idea what Visa she needs to apply for. I cannot get a hold of them over the phone and I really need some help. 
I do have financial documents to provide funds if necessary, so that’s not a problem.
Thank you