It seems it's not so much the database here that matters, but the transaction software and the interfaces you need. Can people pay with creditcard or Paypal or checks, do they earn vouchers when they buy something in your shop, what can they do with their vouchers, do they need to be able to login into their account, what rules for privacy, what rules from the financial authorities, your bookkeeping software, etc.
Without such requirements specified in enough detail nobody can tell what you need.
Hello I am new to the forum
I am wanting to find out what software is available to keep track of customers money
Customer would pay in to an account and save with us just like with ( Park Xmas vouchers) but I need to be able to keep track of individual payments and account savings can anyone please help