The operation of the National Driver Licensing Service is the statutory responsibility of the Road Safety Authority, and I cannot comment on individual cases.
I can however explain the law in regard to driving licence exchange. Driver licence exchange agreements do not cover 'third party' arrangements. Where we recognise a licence for exchange from another jurisdiction, we do so on the basis that the person has qualified to drive in that jurisdiction. If the person originally qualified to drive in a third jurisdiction whose licences are not recognised in Irish law, then they are not eligible for a licence exchange.
Ireland does not have a driver licence exchange agreement with Zimbabwe.