Bought a set of SHOWA coilovers with Spoon springs off the net. When received and installed realised that they where making a clanging sound. Have no idea what it is. But i did swap the coilovers (from rear driver side to rear passanger) and the sound moved with the coilover. So im pretty sure its the coilover, and then the front passenger side started making same noise. Talked to pedders and all, and they diagnosed it as internal shock damage without even looking at it, and they cant do anything about it. What should i do..? I have options, try and return them, which will probably fail, spend money to repair them, or try to sell them elsewhere..?