I ordered both front lower suspension arms for my Ford via click and collect (next day). Went into the branch on Wednesday and my parts were there. No problems at all. I fitted the O/S arm on the Thursday - great! Fitted a treat! Tackled the N/S arm on Friday, and when I unpacked the second arm, I realized it was the wrong one (smaller lower swivel taper).
The point here is that I GOOFED. I ordered the wrong part number, having confused myself over the fitment options, proving that the customer isn't always right! (Although one correct part out of two suggests I might, at least, have been half right!)
I took the part back to Truro (red-faced) on Saturday, and they corrected my mistake immediately. Just booked one part number back in, booked out the one I actually needed (in stock) as a straight swap. No fuss. No drama. I was back on my way with the right part in my grubby mits in a few minutes. So, there we are. Speak as you find, and I have to say I was impressed, especially as it was my mistake, not theirs.