I have created 8 PRODUCTS and imported all the ACCOUNTS. 

Now I want to link Accounts with Products with Many to Many relationship.

One Account may be linked to more than one product.

How do I achieve this?

Zoho help support is pathetic and I have already wasted more than three hours.

Would appreciate your help in this regard.

I have created a file containing Account ID and Product Id.

Multiple Product Id are mentioned against some of the ACCOUNTS with a semicolon (;) separator.