looking for a fuse

The second time I have been to this store and it will be my last. On both visits I had no help and no advice. Once had a lady tell me to turn on my lights while my car was off to check the alt. and battery. The last time I went to get the fuse and showed them the fuse(both of the workers) and without interupting there conversation they both looked at me and said "nope". I asked if it was something they could order..(now there looking at me like im messing up there conversation) and said.. "nope" thats it "nope".