********* and uprofessional service and billing

I did a claim for my windscreen repair through Regent insurance working under Mercedes benz finance on the 04.0315. I then received an sms notification to stating that PG glass silverton will contact me soon. After 2 days of no contact from the service provider, I then called them just to find out if the claim is still valid. I then spoke to their agent who told me that they are very busy that they didn't have time to call me , and she will send someone on Tuesday to install the windscreen on my car. Tuesday a lady called Linora called confirming that the installer is on the way to my office to install the windscreen. The guy came an installed the windscreen.Immediately when he was done he took out an invoice which with costs or billing of about R1633,47that was never discussed through out the week.. I then called Linora just to find out why they didn't inform me on the costs and the method of payment. Her response was \ let me find out what happened and I will come back to you now"she never came back "