美国采购需求：天然油、卡斯蒂利亚肥皂、护手霜、护肤品

I recently received my order for the pump, but unfortunately, it seems to be non-functional. I've followed all the setup instructions, yet I can't get it to open or operate. It's disappointing to encounter such an issue, especially considering that pumps have been utilized effectively for centuries. At this point, I'm unsure how to proceed. Could you please provide guidance on how to troubleshoot this problem? If the pump is indeed defective, I need to know the next steps for either a replacement or a refund. Your prompt assistance in resolving this situation would be greatly appreciated, as I'm relying on this equipment for my operations. Thank you!