Poor service delivery

Dial direct car insurance, please note that we are not happy with the service we have received. Our car was ****** in January and subsequently the ignition had to be changed by the insurance company because the keys were ******. The car was back with us in March and since then it has burnt out the starter, it has been brought to our attention that such a problem can be as a result of a faulty ignition. We have been in touch with dial direct and they have sent us an assessor, they arrived at our house and did a very minor inspection and changed/ or inserted something that has to do with the ignition/starter? This visit was less then 15 minutes and nothing was opened. We are now being told that the same company that initially fixed the car(Keith's Panel Shop) will tow the car to an auto electrical place to see where the fault could be and if it is not the ignition then the towing and all other costs will be to our cost( which seems more like a threat). Can our insurance please make it a priority to be more hands on in this matter and not leave it solely at the discretion of one single individual. As this is a return job can it please be handled by another assessor and not be given back to Keith's Panel Shop as we want everything to be transparent in terms of what is really at fault. Therefore we wish that an impartial party handle this matter at this point, a company that has nothing to do with the initial complaint.