Issues with claim information and resolution

A Discovery Insure client drove into my stationery car - they acknowledged responsibility and informed Discovery Insure. I lodged a third party claim for repairs to my car, was told to get quotes, etc, which I did. I submitted all information to them. They then eventually offered a settlement amount that was lower than the lowest quote I received from the same service provider.

I wanted certain questions answered before I accept the offer e.g. how come their quote was lower than mine when it came from the same provider - what exactly will be repaired as compared to the lowest quote I received, is there a guarantee on the work, what if it is not repaired properly, etc. I have sent these questions via email to the assigned consultant Gretchen Rubin. I have tried calling; my calls go unanswered. I get a short answer from Ms Rubin but no answers to my questions. This matter has been dragging on since September and is still not resolved. Is there someone who can answer my questions and assist so I can get the car repaired ASAP please?

I have been called by Discovery representatives to try and sell me insurance, etc. After this experience, I will certainly not be considering any of those offers.

Please can someone assist to resolve this issue?