Settled account being debited by nsfas without any refunds

Call center and email system terrible.. I paid up my account on 10 November 2018....then App**** for a refund for the money that was going to be debited on my salary for the month of November..I received a paid up letter and still have not received my refund. Instead they debited from my salary again.. When you call the call center you hold for a good 30mins before you can get thruogh to an agent... Who cannot refer you to the finance department to quickly resolve the issue.. I am left bankrupt in Decrmber for the account that was settled.. I dont know how to escalate this.. I have sent numerous emails and made numerous calls with my airtime and all have proved to be unfruitful because I keep getting the same stupid automated replies on emails... If there is a way that I can get assistance please advise as i cant keep funding this scheme. And yes I am going to have a black december because my money is being ******