I ordered (4) O2 sensors for my truck which is a 2...

I ordered (4) O2 sensors for my truck which is a 2001 GMC Sierra 1500HD 6.0L V8 which is what I put in the system. Two of them worked (upstream) and the two downstream ones they sent me were the incorrect part. It s THEIR websites fault, not mine. I was forced to pay for shipping the item they wrongly sent me and now they re refusing to reimburse me. Emailing them feels like you re talking to robots with programmed responses. I will NEVER deal with this company again. Also reporting to the BBB for bad business! Also, when they re done talking to you they will just close the case so you can t respond