Disappointing level and quality of service

After my claim was approved 2 weeks after my accident, I thought the rest of the process of getting my car fixed would be just as smooth and fast. The panel beater sent through their evaluation which needs to now be approved by PMD, it's been 2 weeks, of different stories, and yet I am now inconvenienced for 4 weeks with no car. And the reason given is that their assessors are overly booked. For me to even receive this unacceptable feedback, I have to call daily to find out what is happening with my car, the people managing the claim say they will call back, but never do. Im beyond annoyed with this level and non existent quality of service. I am actually defeated, and would not recommend people I know to use them.