Still waiting for a call back, now 11 days later !!!

I have been a Miway client since 2010. I received my renewed policy last month and I was not impressed with my new premium. So i called Miway on 23/03/2018 and spoke to a client service agent named "Thato", i advised her that i want to speak to a "Senior Adviser" because i wanted my premium to be reviewed and reduced accordingly. She advised me that a senior adviser will call me shortly with my new premium. It is now 11 days later, and i have yet to receive a call from Miway. My premium was deducted on the 26th and remains unchanged. i am used to excellent service from Miway, but this time, i am sadly left disappointed. If i do not receive a call from Miway urgently, then i will be forced to insure my car elsewhere.