I have a simple app created for sales

I use "email" address as primary for all my sales contacts hence i have used the email as the lookup

3 forms, 

customers > basic customer details

Add sales >  form to add sales activity with email as look up

Add call logs > form to add call activity with email as look up

Im having trouble in creating a report view, where i can have button/ links with in contacts for sales log and call log for that particular customer.

please help