Yoga immersion of 15 days but limited as a Philippine Passport Holder

Hi I will be undergoing an intensive yoga immersion in a studio in Hong Kong on October to November. As Philippine Passport holder, I am limited only to less than 15 days. I arrive one day before and leave one after the intensive. I will be needing at least 2 to 3 days of extension in HK. How will I process this request.
Thanks,
Maria Guadalyn