The verb 有 (yǒu) is negated differently from ordinary verbs.Nearly all verbs can be negated with 不. The verb 有 (yǒu) is an exception, and must be negated with 没 (méi).
Structure
Subject + 没 + 有 + Object
Examples
Wǒ méi yǒu shǒujī.
我 没 有 手机。
我 没 有 手机。
I don't have a mobile phone.
Never use 不 with 有.
Wrong: 我 不 有 汽车。
Right: 我 没 有 汽车。
Remember that trying to negate 有 with 不 is a classic mistake that many people make in the early stages of studying Chinese.