What are the best options for a South African on a tourist exempt extension in Thailand to do a border run and apply for a Non-B visa?

a Border run changed into a Non Immigrant B visa. for Kota Bahru: Purpose: To be employed as a teacher in Thailand Required Documents:

Completed visa application form

Original passport with at least 6-month validity and two blank visa pages

A copy of passport (ID page)

A passport size photo (white/ blue background and taken within the past six months)

Proof of the applicant’s academic qualification (e.g. degree certificate)

Documents from the employer (university/ college/ school) in Thailand

6.1 Cover letter addressed to the Royal Thai Embassy

6.2 A copy of the university/ college/ school’s registration

6.3. Criminal record certificate

Letter of approval from the Office of the Private Education Commission (for private school/college only)

A copy of previous or existing work permit in Thailand (for work permit renewal only)

Easy is the border with Malaysia as it is the closest by. Not sure how long you like to stay inside Thailand but if longer than 30 days a visa would be a better option

Google's your friend, but I'm guessing down south to Malaysia. South Africans should be able to enter and bounce out. How long are you planning on staying?