Bad service due to using external warranty

On the 6th of May 2024 took my X1 in to be repaired at Boksburg East rand as it was showing an error driver restraint. Upon booking l advised them that the car is still under motorite warranty. I was then called back and informed that the warranty wont cover this and was quoted R15274,47. I collected the car and pair R1604 for diagnosis. I then returned and asked them to book the car in and will take it with the warranty. Car was then booked in on the 8th of May 2024 was then charged R13317,67. I have been in coms with the motorite and they are asking why didn't BMW follow the process for a warrant claim? I have been asking the following from BMW Failure report with a cause of failure, Diagnostic log,Service record. I have managed to get the service record from them but the rest they cant assist as they say they cant issue once they have repaired the car. I have been forced now to try and get the refund from the insurance but they can't assist without " Failure report with cause of failure" I urgent need this report asap. On the quote that they did they repaired steering column, vehicle test, programming,, replaced switch control unit, cleared error faults.