Cut off / Vodacom cant do accounting - I 128798-2

My monthly payment for in May bounced, I suspect because Vodacom has put through the wrong reference number (they left off the 2). I have been a customer for 20 years and have NEVER had a missed payment. I was cut off and I made a manual payment for R4700 on 28 May. I sent the POP to Vodacom, but they only reconnected me after lengthy discussions with their call centre, as they claimed they cannot put me through to their accounts department. I was then cut off again a week later, as they said they had not received POP. I then spoke to Lindile Tshabalala that confirmed on 18 June to say that the POP has been received and sent back to Finance Department for Recon. She also confirmed tha Investec had made an error with the reference number and that was the issue. Then I got reconnected and disconnected last week. I then sent another email to Lungile, for which I did not receive a reponse and was then contacted by Koba Wessels. This time, she said it is because a there was a payment of R6891 outstanding, and that it bounced. Yes, it bounced, because they forgot to take the R4,700 off, and I only owed R2191 for which there is enough money in my account. STOP!