Telkom account issue

I sent cancellation of telkom account form on 4April2018. Received confirmation on 15June2018. I did not receive any outstanding balance correspondence from Telkom advising that amounts are outstanding. I am now harassed by Vvm for outstanding balances owing to telkom and they cannot provide me with the detailed breakdown of what is owing. They claim that they send me a Telkom statement but I receive nothing except for a summary on a Vvm statement each time with no relevant details. A different call centre agent calls me each time (probably about 40/50 calls over the last 6months) and the conversation starts from scratch each time. They are rude and arrogant! They don’t read my emails and I have asked for a senior manager multiple times. I am now getting calls daily from a different call centre agent! This is ridiculous behaviour! If an amount is validly owing, I will gladly pay but only if they can provide me with proper details otherwise they are **********ly requesting for payment!