ICD code is visible but not being processed as Bonitas wants it to be everywhere on the invoice!

Sent through a claim for a test that was done. Due to Ampath not wanting to deal with medical aid any more and now I can understand why, the code required is visible on the invoice, but my claim is being witheld as the code is not on all the places that it should be. This is what makes me angry as I would like to have my money back, but I was treated like i am dumb, I have to get a new invoice its already been 3 weeks which is ridiculous amount of time to wait for the refund!! Would appreciate it if a manager could help resolve this!!