2000 crew cab

Someone please help me. I have a 2000 crew cab got it a week ago and the keyless remote wont work. I have tried the lock yourself in and put the key in and out and i cant get it to work Please someone help me I dont want to have to pay the dealer $60 to do it would rather spend that money doing something fun with family

Take it back to where you bought it and see if they can help as a courtisy