No response from bank

I am a PhD student receiving a grant from an overseas organisation for scientific equipment. I opened an FNB account rechecked all details and sent the account numbers etc. to the organisation. The organisation assures me that they have made payment into the account and other students have received their grant payment. It has been > 1 month now since payment was made and I didn't receive any payment yet. I have called the forex department at fnb twice and they keep advising me to email the forex department with the query (with ATT: cathrine). However after two emails over a week ago they still did not reply. On the automated reply it is stated that you will have a response after one working day (excl. holidays and weekends). I have no clue how to go about tracing the money now and the overseas organisation is also doing an investigation but they tell me that fnb is also still not replying to their queries.