Bests & Worsts Reviews from Amazon

I'd been using Sensodyne Pronamel Fresh Breath tooth paste for several years with excellent results, buying it in the US (Wallgreens, CVS, Target). Last year I ordered 3 packs (x3) from Amazon because my stock was shortening. I opened my first tube last week with terrible results. First, I noticed some differences in taste and texture and I started to have important sensibility issues until I had to quit using the product. That led me to take a closer look at the product I bought from you. Compared to the last tube I had, there are some variations: the packaging colors of the item I received are completely different from the ones in the previous tubes I bought and the ones showed in the picture in the Amazon page. The tube I had, has a Registerd symbol (®) for Pronamel, and the ones I bought from you doesn't. For me, this is a very serious issue; it's a health one. I'm very unhappy with the purchased item.