Disappointing and full of abandonment of clients.

Where do I begin. First a couple of months ago I summitted a claim for my vehicle which the repair center claimed couldn't be repaired, the assessor came out looked at the vehicle, advised he was going to recommend a cash payout, just after all of this the repair center calls back and says it can be repaired and guess what for the same amount as the payout. The repair is done with some outstanding work that the repair center had to complete, I get my vehicle back and discover the repair centers negligence in checking certain items after the work and my cars engine failed, car goes back fast forward a few moths ( I've been in COMMs with momentum the entire time) I still haven't gotten my car back, I threaten with reporting the repair center and get my car back and you guessed with new problems relating to the work done and furthermore the work that I processed the claim for is already failing, I contact Momentum... No reply... For weeks after numerous phone calls I am told were on it and will deal with it fast forward 3 days I get a mail with Momentum in short waving responsibility because it was a payout. This above me mailing over and over again to change policy details and downgrade insurance on a vehicle I didn't see or use for 5 months and still paid full comprehensive business insurance on (even after I asked for a downgrade) the lack of communication and laying in Limbo with Momentum was an absolute atrocity and I cant believe the service and level of communication I have received, even asking my consultant to call me because I am considering cancelling has resulted in zero comms.