I am a ford master tech wanted to try rock auto du...

I am a ford master tech wanted to try rock auto due to great prices and usually buy locally. I am working a Honda civic and purchased a o2 sensor and air filter which they had in stock and wanted the car running properly asap. I noticed I did not receive I tracking number two days later I logged in to rock auto and found out the air filter was out of stock so they didn't ship the o2 sensor so i cancelled the air filter and called customer service to see if they could get any help. The customer service is like a bad nightmare that you don't want to remember. very rude no help what so ever I asked to speak to the manager and was told by the rude customer service representative the the manager will not help me either I ask to cancel the order which was showing at the warehouse just 15 min ago and was told it was already shipped and I would have to send it back. Which means I have to pay for shipping so I didn't save any money and customer service horrible. Think before you buy ,because I bet there warranty is going to just as bad. stick to advance auto or oreiilys auto parts or your favorite parts store.