Promises for over 3 weeks

I bought a car from MIT MAK Motors about a year and a half ago. They sold me an extended warranty package aswell. I have continued to return the car to them for all repairs and services. I have recently had to claim for warranty work to be carried out on the car and we are entering the 4th week of me chasing them around asking for my service history which the warranty company needs to authorize claim. Since I bought my car they have been promising to give me the service booklet and we are at a point now where they promise everyday to sort it out but never do. I have even been in contact with the Nicolene from the workshop and Ian from the workshop manager. Last week I started liasing with the dealership manager Bobby who is very dismissive to my complaint and merely says “I’ll sort it out now” but never does. I have been without a car for over 3 weeks heading into 4 and I can’t even claim from the warranty they have sold me. This is the 3rd car I have bought from them but is definitely the last.