Car repair bill

The engine in my car started giving trouble 4 weeks ago, it has been in and out of the garage every week but they couldnt find the problem, then one day while driving it started making a knocking sound and died, the mechanic said that it was poorly repaired by the main dealer that i bought it off that diesel had leaked out of the injectors at one point and mixed with the oil and from then on the diesel would have been slowly destroying the lubrication in the engine bearings and crank shaft, anyway the car is on hire purchase and i still have over a year left on it and Ive already been billed over 1k for the recovery truck etc, now it needs a new engine which is another 1k and then its 800euro to get it installed, Ive had to rent a car for the first week and now the garage has loaned me a car untill mine is fixed but I cant get the car back until i pay the 1k engine 800 fitting and now a further 250 for a timing kit, I AM SO BROKE NOW I cant afford it, PLEASE PLEASE PLEASE HELP ME!!