Inflated excess and poor service

I had an accident on the 5th of February. The claims consultant inflated the excess from R3500 to R13000 citing that I was dishonest about a previous insurer. I then requested that the voice recording that proves this is sent to me. When I requested the voice note I was made to sign many papers, yet when the consultant wanted to inflate the cost, they found the voice note within a day. Over and above the inflated excess, Momentum wanted to put pirate parts on my vehicle and justified this with the Ombudsman statement of "excessive cost." I am not sure what defines an excessive cost as there was no third party claim, just me. This claim has taken two months and emails requesting feedback from the claims consultant are not responded to. I certainly feel Momentum has no regard for their clients and the service I have received has been utterly poor. Today is the 19th of April and even though the claim is with the complaints department, there has been no further updates from Momentum, just silence. I am not happy at all with the service.