PH7 and PH4 calibration issues: Client requests refund for defective products.

Client:
Hello, the PH7 and PH4 calibration solutions are defective, I couldn't calibrate my probe with them. I had to purchase them locally and the ones I bought allowed me to calibrate and start using my device. So, I'm requesting a refund for the defective products.

Technical Advisor:
Hello

Client:
Order: KYQBTJEYM placed on 15/04/2023

Technical Advisor:
Hello, I will send you an email regarding this tomorrow

Client:
Okay, thank you. Have a good evening.