Cell number cancelled without notice

I am utterly disappointed with the service I got from Vodacom today. My company has 22 standby phones from Vodacom that are used on a daily basis. We recharge these phones weekly with an amount of R110 minimum. One of the phone numbers got cancelled yesterday 31 August 2015 without any notification from Vodacom. I called them to find out why we cannot use the number anymore and I was told that the number was cancelled. I asked them why the number was cancelled they could not give a proper answer. I told them that it is a standby phone and it is used 24/7 365 days of the year. I asked them to re-instate the number, after being put on hold for a long time I was given a number to dial for re-connection. I called the number and the consultant acted like I have lost my mind because she cannot find any evidence of the number or its existence. She referred me back to Customer care they could not solve my problem either. I cannot understand how they could cancel the number when in the last week only we recharged four times with R110 each time, if this is the service we get, we might as well go else where. We have been using this number for almost 10 years. Thanks for nothing Vodacom. MXM