Service deliver no good

My vehicle has been out of order since it was involved in an accident in the beginning of January. Three months later and there is still no eta on the parts. I am the only one following up on the parts progress. It is not my duty to do this. You forced me to use the panelbeaters of you choice and now I am the one waiting for my car for three months and not knowing how long still, as the parts have no eta. No one at KingPrice is showing any interest in following up on the claim. Each time I have to phone you and then promises are made to follow up and phone me back. Either they don't phone or it's the same story "still waiting for parts, no eta" Surely somoene should come with a resolution. If the parts are not available to repair the car it should be written off and payd out.