No response to emails,can never get them by phone

In January 2015 I cancelled my granddaughters phone who moved to the UK, I administer all her SA affairs, having never got a final bill, I forgot about it.<br> I recently received a letter from Telkom, dated 30th June 2015, stating that she owed R 1053.10 with a reference number ***.<br> I have called the phone number *** and hung on for 15 minuets 3 or 4 times, with no response, thus I put on their web site on 20-07-15:<br> I am in receipt of your letter dated 30-06-15, which has only just been received. After trying to phone and hold on for at least 15mins, I am writing this in utter disgust! I cancelled my phone in January 2015 and have had no subsequent invoices from you. I will not pay until I see the last invoice with a payment and then subsequent invoices showing full history, up till the cancellation.<br> As I got no reply I put it on again on 28-07-15<br> <br>