The worst service and CSC in the world

So my phone goes in for repair on insurance claim on the 22/03/2018 on booking I was promised within 14 days I will have phone back, well to my great suprise I still have nothing and no one can tell me whats happening. After numerous calls and holding for 30mins I was promised a manager will contact me back up untill now my call has never been returned. Why promise me 14 days and then when U can not deliver I get left in the dark no one can tell me anything... I find this strange, manage the expectation that was created by you and keep me informed now I worried insurance prem and phone goes off but I have no phone.