Number deleted of the network without warning

My number was permanently deactivated while in use? No warning what soever from them. A number I've had for 18 years and is linked to my banking platforms. I called the collections department several times and each time the agents we disgustingly rude. I went to a vodacom shop too in cresta and did not get assistance. I am told my number cannot be reinstated. This number has been port from mtn, cell c and Telkom over the 18 years I've had it. Who gives vodacom the right to deactivate subscribers out of the blue. I want this sorted absolutely no one is willing to help. What is the point of the support departments then?