Formal:
* Baie dankie - This is the most common and formal way to say "Thank you very much".
* Dankie baie - This is another formal way to say it, emphasizing the "very much" part.
Informal:
* Dankie, hoor - This is a more casual way to say "Thank you very much", literally meaning "Thank you, hear".
* Dankie, regtig - This is another informal option, literally meaning "Thank you, truly".
More expressive:
* Baie dankie tog! - This is a more emphatic way to say "Thank you very much", literally meaning "Thank you very much indeed!".
* Dankie, baie dankie! - This is another way to emphasize your gratitude.
The best option will depend on the context and your relationship with the person you are speaking to.