My question involves criminal law for the state of:

i was recently caught shoplifting at the local walmart, and had merchandise under $15, i was taking to a back room, told i was banned from all walmarts, and was told that i would have to pay a fine, and would recieve a letter from there lawyers in the mail, my question is how long should it take to recieve that letter with the fine included, and once i pay the fine is this done and over with?