Mocha Chocolate Chip Cheesecake

• 12 seimi sweet chochips
• 1 env
• 525 gr butter
• 475 ml cream (heavy)
• 400 ml sweetened condensed milk
• 450 ml cream cheese
• 230 gr graham cracker crumbs
• 160 gr chocolate chips
• 120 ml milk
• 20 gr instant coffee