Horrible service from Vodacom

For the past 6 months I have been getting calls from Banaard & Raaff, Mncube Incorporated and MBD to settle one account from Vodacom. All 3 firms are saying my one account was handed to all of the.

One firm says I owe them 3.5k, the second says 1.9k and the third says 1.5k. There is no consistency at all and I keep calling Vodacom and they are of no help. I have been to a Vodacom store about 4 times and they are not helping.

I have a negative credit score rating because all these 3 firm s keep claiming payments and threatening to attach my property.