Verbally threatens to hit me,

I had previously bought a battery for a motorbike I was fixing, they did not tell me that you had to keep the battery up straight, so it had spilt everywhere in the storage compartment of my scooter, damaging a few items. I went back there, and explained what happened to the employee named Mike, who sold me the battery. He told me that it was not his problem and that I should have known to not put the battery on its side, I then responded with that I was not a professional so I did not know that and that it was his responsibility to inform me. He responded angrily to me and threatened to hit me. He said he did not want to deal with me and he was extremely rude. The manager came and assisted me, but he too had a bad attitude. I was not in anyway out of order, and never should an employee ignore a customers concerns or threaten to hit them.