5 Days without a car

I took my car (Golf 7) 1.4 TSI to NTT East London last week on the 2nd June to have a second test done after it was giving me problems. Every week I had to fill some oil in., this started after my 60 000 service. After the test on Tuesday I was called they told me my car had failed the test and needed to be st********** the engine to find out what is wrong. the car slept at their premises the Tuesday. on Wednesday I went there personally to find out what is going to happened as I need the car to go around and have business meeting to attend and a revenue to make in order to pay for the car. I was given VW SA number to launch a claim. its been a week now and still I don't have a car and I cant get my business running and I still have to pay for it month end. All they saying is we have to wait for them to asses the car and if they will order parts only then they will make arrangements for me to have a car. this is totally unfair as this is a mechanical fault. my car is new and still under warranty I bought it 2013 when the model came out. I really don't know what to do anymore. in the end I will not even have enough money to pay for the car month end, if this weeks ends.