BAD SERVICE

i bought a ring and a watch at sterns in Hammanskraal on the 28th of March this year. i had my watch for 1 and half month, then my watch stopped working i called the store and spoke to a lady i cant remember her name then she said i can come to the store with my guarantee slip, of which i did but a week later. what made angry was when the lady told me that i have to wait 2 months because they must book it for repairs. this has a guarantee i don't understand why must i wait 2 month for something that i even bought cash for.