over charged amount

i paid an amount of R180.00 at Absa ATM on the 6th of March 2015, i was then over charged on the 25th of March where i called Netstar accounts and Nomsa Cindi asked me to fax a proof of payment which i did the following day but she never acknowledge my E-mail no r calls. I called the call center and asked to be transferred to accounts Sifiso was very greateful and managed to convey the message to Nomsa only then she responded to my e-mail where she stated that my account will be reversed in 7 to 14 days which never happened, Yesterday i received an sms from Altech to let me know my account is in arrears, I called Netstar and i was given the number *** assuming that is Nomsa's Manager, The Gentlemen asked me to re-send the e-mail communication between myself and Nomsa which i did. this Morning i sent mr Jagedesanp an e-mail regarding my query i never got any response. i would like some one to assist me on this matter a.s.a.p