Old Landline number lost

When I got Telkom Fibre to Home, I was told I could keep my landline number when I cancelled it. Since then, various individuals from Telkom assured me it is possible to have my old landline number transferred to my new Fibre line. Despite this, I still sit with the new number hoping no-one has been allocated my old number.

GNP allows me to transfer my landline number to a different company, but it seems Telkom is unable to transfer my old number from my old landline to the new Fibre Line.