Missing international payments money

I made international payment on 1 August from standard bank to united bank of africa i have been enquiring with standard bank for a while now as the recepient said her bank said they can't see the money with the proof of payment provided, at standard bank no 1 is assisting me to enquire with yhe foreign bank or to provide me with section id 30 digit number as requested by foreign bank, this has been a very painful and traumatising experience.