Terrible service provided BY IUA when processing claims

I have been trying to get my warranty claim approved for a week now, my dealer has provided all the requested information including the pictures requested but on a daily basis there seems to be new requests and pictures provided seem to be not enough evidence, I haven't had a car for a week now because my car is not in a drivable condition, they asked for the faulty part to be stripped and that has been done and the photos where also sent to them but still they have not approved this claim.