Bad service on 3rd Party claiming

My husband was in a car accident around May 2021 of which the 3rd party claimed with his insurance. The 3rd party had bumped into my husband from behind causing damage to my back bumper. The claim was handed over to a company that works with Liberty to handle all the paper work. We received an email that an expert would come and evaluate the damage but had sent images as was previously requested. While still waiting we got an email that the proposed offer was at R7617.09 even though we had been asked to get three quotes and the cheapest was around R15K. I asked how that could be that the guy didn’t even come out and see the damage yet preferred companies evaluated the damage higher than they did. I was told these guys are experts and that’s the figure they willing to pay. Because I had already waited about 5 months tried to fight it but eventually gave in because it had taken so long to even get to where we were. We accepted the offer on the 25th of Feb and still to date haven’t been paid. Every time I follow up the person assisting says she’ll follow up with the client. I was told from acceptance of the offer a month later we’d be paid. To date we are still waiting. We want this resolved so we can move on from this bad service we’ve received.