Vodacom *****

I had a vodacom contract in 2017. I was under debt review and vodacom handed over a bebt of +- R4000 which was paid in full. They then handed my account to NBD and payments was made to them in full. Then they handed over a bill of R14000 to capital data. Which is being paid off again for a second time. Knowing I only have 1 contract. Now I am getting calls from a 3rd collection company saying I last paid in 2017. What ***** is this and why is Vodacom capitalising like this. Vodacom stop your ***** as I will take this further handing over the same debt to 3 different debt collectors all with interest on a debt that is paid already.