Pathetic Service

I have App**** for private finance on the 2 August 2018,today is the 14 August I still have not signed a contract for the finance, everytime I call to speak to the marketer she is either busy on a call or on Lunch,i leave messages for her to call me back but she does not return my calls, everytime documents are requested we send it in on time, last Tuesday she contacted the seller to send the car for a Dekra inspection which was done and documents was sent to her on Friday 10 August, On Monday 13 August we still had not received feedback regarding the documents sent on Friday, I had to call the call center three times and when I eventually asked to speak to the manager they put me through to the marketer who informed me she was trying to get hold of the technician who did the tests but could not. Today the 14 August she advised us that the car needs to now go to the manufacturer for sorting out, because she couldn't get hold of the technician to query certain things why does it take so long for feedback, it took her three days to tell us this, this application is taking far to long, we contacted Dekra via the number on the invoice they had given us and they gave us a number for the branch where the tests were done, why couldn't the marketer do this? She only gives feedback when we phone it is taking two weeks and it's costing us money to go back and forth. I am extremely disappointed with the service from Fnb upon trying to get through to a manager to complain I can't get through. If it is so hard to get finance with my bank I should rather take my business elsewhere because all that is happening is we going back and forth and nothing is being resolved! Bare in mind this is a private seller and the car can get sold at any time and this is the pathetic run around Fnb is giving us!