Credit card dispute query

Last week Thursday, I downloaded an App onto my son's IPhone and for this app you had options of paying for the use of the app, where we chose the R30.75 per month option, but after I put my banking details in, R369.99 was deducted from my credit card, which I didn't agree with. I sent mails to an e-mail address which was the only way of contacting someone in regards to this app to request a cancellation of the app and then to pay my funds back, but this never occurred and I have not received any feedback on my mails. I went to Absa branch Friday the 24th of May to reverse the debit order, but as it was uncleared, seeing that I hadn't paid money in yet, they couldn't reverse it for me. I spoke to Elize who told me to pay money into my credit card, so that it can get deducted and thereafter I can phone the number on the back of my card ********** 273, for assistance in reversing the transaction so on Tuesday morning I called the number, only to find out that I need to send an e-mail to ********** where after they will assist me with the reversal. I asked the consultant how long this would take, seeing that I don't have enough funds in my account for the monthly fees to go off on the 1st, so this needs to be sorted before then and he told me that they will read my mail immediately and get back to me. I sent an e-mail Tuesday the 28th at 8:49 and straight away got an e-mail with a case reference number C- ********** 6 and that a consultant will get back to me as soon as possible, but until now, no one has made any contact with me and I have even responded with 2 e-mails after Tuesday to inquire as to when I will get response, but it is like my mail is just getting ignored, cause I don't even get acknowledgement of my mails. I have stated the urgency since Tuesday, as now tomorrow is the 1st and my monthly charges will go off and I will be in arrears on my account, due to not getting prompt assistance from credit card dispute department. Why isn't there a function online to reverse transactions myself, cause then I wouldn't even have struggled like I am now. I am very disgusted with the lack of service I received up until now.