Poor Customer Service

I ordered a face mask at the end of May. As I was still using my last mask, I opened it 3 months and 12 days later. It was a "new" product - peel off mask. After using it, my skin started burning, turned red, and was still tender a day later. After phoning the Avon Rep, who in turn phoned her manager, I was asked "Why did you only use it now?" Answer was, I still had a mask I needed to finish. One always orders in advance, so when 1 product finishes you have a replacement. I was then told, their product is only guaranteed for 3 months, so sorry, we cannot help you. 12 days over? How long was that product sitting in their warehouse before I got it? Sadly, after using Avon for many, many years, I have used it for the last time. I will be changing my skincare.