Insurance chaos

An uninsured individual drove into on 4 April 24 so I had to go via my insurance for repairs. I got 2 quotes and before getting a 3rd was told it wasn't necessary. DialDirect's assessor's came in with a total repair cost below the cost of the parts of the quotes I got. I then find out the repair place they selected is not approved by my vehicle manufacturer and it is still under warranty. I eventually get the car to an approved service provider and today 2 months after the accident my car is still not repaired as insurance is delaying approval and payment for required parts. No courtesy vehicle provided, I still have to make car payments and incurr additional costs to get to work. To add insult to injury they deducted double the insurance amount this month