I would start by using Nizoral shampoo (2% Ketoconazole). Ketoconazole kills scalp fungi. That is likely to be a good place to start.
Once the fungus is dealt with I would recommend using anti-inflammatories and hair growth stimulators (these are included in the Growth Factors serum).
You might also consider a piroctone olamine shampoo, but I’d try the Nizoral first.
I would also recommend going to a Dermatologist. They will be able to examine your scalp with an endoscope and clearly see what the infection is and give you the correct treatment. That would be my number one recommendation.
Once you’ve got the infection dealt with I would recommend using the Dermaroller and Growth Factors serum to recover the health of your scalp and get your hair growing again.