Have not paid in the 15 days as promised

I recently went through a grueling process with Mutual & Federal which has still not been resolved , let me get straight to the last point , upon finally accepting my quote and processing it on the 14th of July i was then promised payment would be made and reflected in my account between 10 - 15days , on Monday the 3rd i called in just to make sure everything was on track for payment Wednesday the 5 which would have been the 15th day , i was told it will be processed now for payment to reflect the 5th August , when i checked on the 5th there was no money reflecting which i then called back and told another lady that i have booked my car in for the 6th August to get fixed will the money reflect then , only to be told not worry the money will reflect on the 6th , today the 6th the money still hasnt reflected , i have called again and they have now put me through to the proper finance dept who has told this will be only processed today and expert payment in 48hrs , i have now booked my car in at a cost ok 12k expecting the money to be released today and all i can get from them is oh well there is nothing i can do , truly shocking from a well known company people beware