Struggling to get a refund from October 2018

I have been waiting for over 2 weeks for my bank details to be updated and my refund made. The last note on my call says the call is closed and that Hlengiwe Mtambo (HM) ********** tried to contact me. I responded to her email the same day and then a few days later. No response, I called numerous times and each person has emailed Hlengiwe as well (Lindewe, Letabho). I have asked the supervisor to call me back. No luck. THIS IS THE WORST COMPANY. Now the reason I have refund due to me is because I returned a device in October last year and cancelled another contract as the other one was opened in error so this whole disaster of a show has been going on since October 2017 and to top it all off I am still being debited. PLEASE COULD I GET MY MONEY BAC****!!!!! Why is there no central customer support desk where you can escalate your query to the actual department concerned? This is worse than home affairs.