Deceased notice and account enquiry

We inquired per email to Legal on 7,11, 19 & 22 Jan 2016 - Main Member of one of our Businesses has passed away - the appointed estate executor requested that the 4 numbers held in Vodacom Business contract department must be switched to prepaid and the numbers still under contract obligation, quoted to be paid up as well. Sadly no response other than emails being read. Customer Care keep on referring my call to legal(spending hours and hours on hold with no assistance or call being cut off), and legal automated voice machine does not recognize the deceased party ID number as correct. To our utter frustration we urgently requested this matter to be dealt with prior to month-end - still no response. We submitted all documentation undersigned, death certificates and ID, letter of executor appointments and legal fails to respond - even after we emailed them that this matter will be referred to Hello Peter - it seems it is easier to take out a contract than cancelling one. The utter frustration of dealing with hour long calls and no department taking responsibility for this. Do we have stop all debit order and refer the matter to our attorney's handling this estate to get response????