False Debt Claim

I have been bombarded with threats from this debt collecter acting on behalf of Telkom. They claim I am indebted to Telkom. I responded to their claim via a whattsapp number given in their threatening message but still it just carries on. They and Telkom are thick as bricks as they dont understand the difference between a debit and credit. I invited them to go and listen to all the recorded discusdions I had with numerous Telkom consultants and then let me have proof of the debt. Nudebt and Telkom get your house in order brfore you threaten me any further. In fact I have a credit on my account.