Billing dispute

I've been trying to log a billing dispute but no one has been able to help me. My debit order for April was not debited by Telkom (i'm not sure why) so the balance was brought forward and i had to pay R1 111.82 for June. This payment was debited by Telkom on 25 June 2018.

I checked my account and now the R1 111.82 has been brought forward for July and i "owe" R1 466.38. I don't understand how a payment is debited from my account and it still reflects as not paid on your system. Can someone contact me and fix this!