Vodacom changed my business number to a random number without my knowledge.

I run my business on my phone and even though alot is on whatsap there is direct calls as well. So for about 2 months now I buy airtime on my bank app but it doesn't come through to my phone. However if I buy airtime at a shop it works. I also realized business is really getting abnormally quiet. This morning, I was looking for a setting on my phone and click on notices. Here I find a message that says Vodacom changed my number to ***. and that if I didn't respond in 24hrs my old number disappears. this was send last year. I have printed all my business material with that number. This is truly devastating to my business. What the hell. What is Vodacom going to do about this.