MARLON at Vodacom is just like the rest of VODACOM- NOT A WORD since 15 May??

SInce Nov 2018-(6 Months)- of trying to get a CREDIT for a SERVICE I DID NOT GET. I have spent hours on the Call Centre Line only to be bounced between Customer Service, Accounts and Fibre departments, without resolution. FTTH email - no reply= no resolution. IP TALK -R 113.16 excl VAT per month still being billed. Marlon the Supervisor called me 15 May and promised that someone from his department would resolve my issue . NOT A WORD FROM ANYONE SINCE. PATHETIC!!!