Car Total debt, car rental period

Hello all together. Have a very big problem ! On 23.4.18 a 7.5 tonner pushed me my front door parked Golf Cabrio, 1,8 Highliner together, just received TÜV new, the car was impeccable and without defects and rust. I should also stand there. One should not believe it, but true . The car is now an economic total damage according to opinion of 24.3.18. I am now unfortunately severely handicapped, can no longer go far ways, how carry. two weeks to use the rental car. I have not yet received the money from the opposing insurance company (approx. 3000 euros), I receive a disability pension of 670 euros and can thus not obtain an equivalent vehicle in the two week period !!!!!! What now ? I am severely disabled and referred to a vehicle. Is there possibly a longer period to use my rental car, due to my situation over the two week period ? Because if I had the money already, het I did not have stupid problems because of my severe disability. Who can please help me ????????