My number didn’t exist for 3 days

My number seemed to disappear for 3 days and I had to move to a landline to take business calls as I did not have the time to go to Vodacom to sort this out. Individuals would call my number and it would say “this number doesn’t exist”. As I run a business and am a business customer, it’s highly important that I’m reachable at all times, think in future after this contract has passed, I will look towards other options, other than Vodacom.