No answer AGAIN on cancel line 10210

I have been on hold this time for 25 min and 43 seconds to cancel my sister's landline, as she only has her cellphone at work and can't afford to hold for this long on her billing!! Once again the operator says: Please note due to high call volume there may be a delay in answering your call...<br> Her land line number to cancel is ***, her account number is *** she needs to give her one month's notice from today 11 August 2015<br> Her cell number is *** (Natasja Fourie)<br> She has logged an online support ticket, but there is no confirmation or ticket number available.<br> <br> Please could someone contact her and help her sort out the cancellation.<br>