DHA's unfair handling of applications

Applying for a study visum in March 2015, we submitted all required documents and paid the fee of R1300. Our application got rejected because DHA changed the list of required documents without letting anyone know. We had to appeal and pay the R1300 again. It is now a month since the appeal and nothing is happening. The person concerned is from Namibia and is currently studying at The North West University. He cannot get back into the country after the holiday period as his visitors visa is expiring on 7 July. How is it possible that DHA can change the rules without VFS Global being able to tell applicants about it? Why is VFS Global employed by DHA if they have no useful function? Is it fair to expect people to pay again AND create the problem that we are currently facing with the student probably not going to be able to finish his study year whilst his fees has already been paid?