Fibre transfer

Need to change banking details from my late husband to my banking details getting no help from vodacom fibre t that don't seem to know what they are doing,I sent all the required documents to their deceased department and get the reference number,but when I called to do a follow up they told me to contact the fibre department of which I did and they also tell me to contact the deceased department,all I want is to change the banking details or transfer the fibre into my name.but I'm not getting any help as my late husband account it has been closed,I'm very disappointed and frustrated with the service I'm getting from both of this department.