Vodacom After Sales Department

Shocking service from your after-sales department which is costing me R1800 a month with not a word of feedback. I have reported this 3 times, 3 phone calls of explaining for over 20 minutes to 3 different call agents. Each promised me that my case would be escalated and I would receive feedback between 3 - 7 days. 3 Weeks of not one word of feedback. I am at a complete loss of where to go from here.