TFG app not working - claim account is in arrears

Good day, <br> <br> On 2 April 2016 I made a payment to my account using the TFG app on my iPhone. The transaction was successful but TFG (Duesouth) claims it wasn't. The transaction also reflects on my credit card statement. Meanwhile I am receiving SMS messages that my account is in arrears and that it can affect my credit record - BUT I did make the payment! I also contacted the TFG call centre (using a tel no in one of the SMS's) twice (7 and 14 April) and even mailed (14 April) a supervisor explaining my situation - BUT no response from TFG. On the app it also reflects now that other costs like a collection letter fee and sms charges are being added to my account. <br> <br> Will someone please assist and rectify this issue. And for future, if there is a problem with the app, please inform customers on the app or pull the app from the store to avoid unnecessary frustration. And please improve on your customer services by actually replying to my cries of help. I am actually trying and willing to pay what is due, but I can't be held liable for your systems not working properly.<br> <br> Kind regards