Number wiped off Vodacom system

My mother has been a loyal vodacom customer for the last 20 years, unfortunately she passed on two weeks ago. I then decided to cancel her cell phone contract which had been paid off but was running on a month to month basis. The customer service agent I spoke to misinformed me about how to go about cancelling a contract which led to my mother's number being completely wiped off the system. She didn't even bother explaining the various options which were available when cancelling a contract nor did she offer me a form to fill in where I could have seen the options for myself.

Now, during my period of grief, I am running around being sent from pillar to post trying to get the number back as I need to use it for various purposes including as verification of my mother's identity for insurance and her employer's purposes. How on earth will I authenticate her policies because now her cellphone number has become just as important as her identification number? Especially because in the email I wrote, I explicitly wrote that it has been two weeks since she passed.

Honestly people who work with services need think a little harder than they do. I would like to think that especially people who work in a department working with the accounts of the deceased would know the importance of a cell phone number as an identity and they should be more considerate especially when dealing with grieving families.

I need her number to be reactivate ASAP.