VODACOM RECYCLING NUMBERS

I app**** for a new contract during the month of July, I received my phones and sim cards. To my detriment the number that I was allocated belonged to some business owner. To my dismay , this person owes so many people money , I get random phone calls at odd hours of the day. If its not his debtors looking for him to repossess stuff, its his clients harrasing me. I raised this issue with Vodacom, instead of assisting me they tell me that they cannot block the notifications or calls from their side. Granted , but give me a solution , I was told to block whatsapps as and when they come in, and install True Caller on my phone to see whose calling , or pay 285.00 for a new number

My question is this 1. Why do I have to put up with this harassments 2. Why is this suddenly my problem. 3.Why do I have to pay to get another number, like really.

In closing, I want another number at no cost to me.