s**** engine false guarantee just lies

bought a mercedes 271 engine from these *****s and after fitting and a lot of cost it could not start so I check and find it don't have compression, since it was still under guarantee I phoned and they sent a guy to come check and he found that the engine was s**** and told all the mercedes engines that they had sold that month was s**** and to the didn't honour one guarantee so I must strip and see what was the problem, so I stripped and found that the pistons was melted now they offered to supply me with a supassembly in good condition and refused to refund,so I was forced to except.so after phoning to hear when they will deliver ,I was informed by Azul that they will give me one second hand piston that I must collect I was very upset and checked there reviews and hello Peter and found that they are cheating hundreds of people out of their money