I’m very sorry about you poor experience, don’t know if you can contact someone above that employee. Thru email at minimum, or ask to be called. Def at least work with you a little. I’ve experienced issues with some of my local LFS in the past, unfortunately the solution was to stop going there. But understand depending on your location that’s not always possible. Keep your chin up, this is just an infuriating bump in the road. Try and remember you have 2 happy fish at home!