Bad customer service

I had a terrible experience after I was involved in a car accident in July. Repairs took forever I received my car after 2 months, I have a plan with a courtesy car which is a rental car,I have not received my rental deposit after almost a month because of money due to the rental company by discovery. When my car returned, it had problems and a loud noise. I took it back, the noise problem was fixed but there are still repairs to be done on the car which can only be done once discovery approves but I am hearing nothing from them. I never get hold of the agent helping me with my claim.