I have no idea what heightomax contains. I suspect it may contain calcium and growth hormone
Height is mainly determined by genetic factors and there is very little, one can do to increase height.
There are lots of people out there, who cheat the masses by false promises and one learns these things by expensive experiences.
Height usually increases up to the age of 20 Yrs. of age, when the growing end of bone fuses with the shaft of the long bone.
You still have some more years to increase your height.
Be very careful before investing money in such things. Most of the time it will be a fraud.