Issuing ID document

I must say it has been a mission if not impossible for the process to happen for this person.

After a few attempts of getting an ID issued which never happened I thought this must be the only way something can be done. My brother’s ex-wife left his child a few months after birth to seek better prospects elsewhere as their relationship was hitting rock bottom, so she left the child with my mom who is now a pensioner. To cut a long story short after countless attempts of getting him his ID it was later discovered that he in an actually fact was registered with different names but needless to say that the child was already in school using a different so it was never gonna work for him to use that document. He is now almost 17 still without ID and Home affairs is making it impossible for him to get one, now in grade 11 and next year is required to have some kind of identification since it will be his final year at school.

I just need to know who I can call or what I need to do because right now my hands are behind my back since my mom failed and she is the person who has been taking care of this chap from then.