useless and not taking responsibility

i am so disappointed with the service at momentum, i got involved in an accident last May and my car was taken to renew it which it had to go back there like more than 3 times without the problem being solved, only today my car went there for the 4th time not they telling me they cant fix it as it is a new damaged while there are the only one worked on my car. i found momentum not real taking car of their client as this is not supposed to be my fight but there fight with renewit. And the renewit is a very useless institute.