Bad service

My son Ofentse Zimba, student no: ********** 3 sent a refund request, which was responded to by Mr Aubrey Mohale. Upon receipt of the refund request he asked if he would be writing the examinations for the suspended modules, with which he specified he would not be doing yet they were reinstated, which is incorrect. I have received all the emails as images from my son in which it shows the correspondence between my son and Aubrey Mohale from the finance department, my attempts to call have been unsuccessful. His office number and the number for the finance department are always engaged and he isn't responding to my son regardless of the error that was made.