Airsoft Canada - Experienced TM Glock 18c tech wanted

Hello! I have a Tm g18 that has been nothing but issues since i got it. It light strikes no matter what spring is in it, or it doesnt feed properly or it doesnt cyle at all. Ive tried Putting a brand new 150 percent recoil and hammer spring in it, ive changed the pistol head, i lubed everything up, i tried shimming the mags with tape(helped for a bit). I have tried absolutly everything and am completely pissed off. So im looking for someone who i can send this too and can get this damn thing working properly. Thanks and hope someone can help me get his working