So much for Customer Service

I sent someone to collect a part at Ryobi, when the guy returned with my stop valve I noticed that the thread is the wrong size, please keep in mind that I sent the sample with my driver. I gave them a call and was put through to the sales desk where a guy assisted me (think George, not sure) he saw there is an AC and RC difference and will find out and get back to me, when I asked when, he got upset and told me that he had a customer in front of him and also wanted me to speak to the customer for some reason. So is it Stevens & Co's policy that when I purchase a part, product etc. and walk out the shop that my value as a customer falls away? I run a small business and cant go ahead and spray my product today, leaving me with a canceled order and losing a sale! I own thousands of rands in Ryobi equipment and feel very disapointed. This is NOT my mistake, especially when I send the sample and its a disgrace how I got treated over the phone when I needed assistance!!!