Ridiculous sluggish service with 3rd party claim

On the 3rd of March 2021 in the evening I was involved in an accident where my vehicle was bumper bashed from the back which involved 3 cars with mine being the one in front. As per the law the instigator of the accident in such cases can be held liable through a 3rd party claim- However in this case till date nothing has been processed by the responsible insurance company.

on the 25th of March 2021 I submitted my documents as requested by the insurance company at hand- mind you this was after collecting 2 different quotations which have probably expired by now.

After submission a follow up email was sent in which I was informed that an assessor should be in contact with me within 72 hours and till date that has not happened. I have done numerous follow ups in which I keep getting informed that they are having issues with their own claim and are currently awaiting finalisation.

This is honestly *********** considering its more than 2 months and the situation is still stagnant whereas our vehicles are still not attended to.