Vodacom sucks as usual

I took out an additional contract last month, I have since received calls every day from the morning to the night from people wanting their connections fixed because somehow my number is linked to an IT company. Vodacom tells me that the number was recycled and it gets recycled after a year of not being in use. How could it not be in use for a year if these people have been phoning this number and they said they were getting through to the IT company.

Then the lady goes on in saying I need to activate my caller line ID to see the numbers then I can block it, so you take out a contract and then you must pay extra to be able to see the numbers that are calling you.

Damn ridiculous, all they ever want is money but can't assist without having to pay