Worst Service Ever

I have been calling more than 4 times at the c-surance, first of all the calls are not free then they make you hold, I. Called today on 02/04/2015 to find how far my claim is, they telling me they can't find my documents, yet I called the previous week and they acknowledged that they received the documents, there is no sense of urgency or customer service, one has to go through this everytime we call c-surance, this is totally unacceptable and it is really frustrating, they all promise to call you back with feedback but they will never do that, what kind of service is that, right now I demand feedback with regards to my claim, because I cannot take this pathetic service any longer, I am definitely porting to another network after this, if it's not the network then it's the service, it is really unfair.