We need a payment system where users can make a deposit into a certain bank account and not electronically via Internet. Many users are skeptical and would rather make a deposit at a bank personally, or via his own online banking system. User can then contact admin with payment details - Admin verify payment - Then upgrade the user manually according payment (No need for payment system to be automated)
In admin just a input field where admin can enter Banking details eg. Account holders name, Bank name, Type of account and branch code. When user select payment method as Bank / Wire Transfer, a pop up screen with the details and a short instruction.