I have / I am having

Whenever‘have’. is used to talk about the possession of something, ‘i-n-g’ – is NOT added.

Examples – 

Correct sentence : I  have a pen.

Incorrect sentence : I am  having a pen.

Correct sentence : I  had his project file.

Incorrect sentence : I was  having his project file.

Correct sentence : My parents  have all my original documents.

Incorrect sentence : My parents are  having all my original documents.

Correct sentence : He  had a bike.

Incorrect sentence : He  was having a bike.