Refund nightmare

My daughter attends Silverlake Spark Schools. My had a credit on my account of R7900. I then requested that I be refunded an amount of R7400. My first request was submitted on the 20th of April with all the documents. I requested an amount of R4400 to be refunded. After no response I sent in a new request on the 2nd of May 2018 for an amount of R7400 to be refunded since I will be moving closer to the school and will not require aftercare. After several follow ups I was told it will take 8 to 14 working days. I got an email from Hlaka and was told that my refund will be processed on the Tuesday the 8th of May. I did not receive any refund on the 8th of May. This morning on the 15th of May I sent an email to Hlaka telling her I am still waiting for the refund. After a call from her and sending through my documents again I get a an email from Hlaka stating that a refund for R4400 was processed. This is totally unacceptable. After the bad service that I get your accounts department decides to keep R3000 for aftercare that is post paid. Please refund my full amount of R7400 immediately.