Thanks for your query.Based on the fact that you have posted you have Oligospermia
.Tand now you are taking Addyzoa since three months to increase sperm count
and your recent sperm count is almost same.The fact of the reality is that there are medicines that can increase to sperm count .There are many medicines in every faculty of medicine who claim to increase the sperm count but there claim has no scientific base to prove their effectiveness.
In a given situation I would advise you to consult qualified Infertility
Specialist and take his help and guidance for Assisted Reproductive Technology like IVF or ICSI
It is difficult to make any comment now on your sperm count when you fathered a child few years back.