RockAuto Purchased an O2 sensor, order 34519289. Causes a permanent fault reading. Madison Wisconsin

I purchssed an O2 sensor from RockAuto, order #34519289, for a 2006 Dodge Dakota, to take care of an intermittant. After installation, I now have a permanent fault, and and inspection is due at the end of the month. I did have someone else install the part, someone with years of experience.

I tried to use their site to report a problem, but the site is not functional. I reported to them by email, but all they care about is that I use their not functioning site to report the problem, and arrange for return at my expense.

I also purchased a set of disc pads, order #33630238, which are not even close to what is needed for a 2010 Hyundai Sonata.

The same problem of communication exists for this order, in that their site is not functional and I can't use it to make a return and obtain the correct part.

This is the third problem I have had wirh them. The first was when I ordered some parts for the Dakota, and I got a ghost ie, a part that showed up on the Dakota section, but was not actually there and when I checked out, it defaulted to the next actual part. They could not understand my explanation of the problem, not being computer savvy. I would have had to pay to ship the part back, and it would have cost me more than I spent.

They refuse to listen to issues. I liked the cost, but the poor service is going to make me shop elsewhere.