Vodacom Customer Services cannot be rated as it is below the lowest standard!

My mother passed away October 2018, since then her lawyers and I have been in contact with Vodacom (legal department) to date no response on the following points :

Vodacom to confirm proof on signed contract that monies still get collected when deceased; (which have been collected after submitting a death certificate to the Vodacom's Legal Department); Credit to be used as charged from December 2018, no activity on account, as Vodacom informed us “change of ownership” not possible, but still deducted money on a monthly basis; Amount of R2,959.29 incorrectly deducted on 7 May 2019 to be reimbursed?

To date, no response from Vodacom!