Build an Online Store

Opencart Extension or Module customer to register as VIP member different VIP levels with different discounts? VIP member will have different price different to general customer Price on the store Credit or bonus will given to each VIP customer on each purchases VIP member will be able to view their accumulated credit "credit" is different to the opencart point reward or credit system ability to convert their accumulated credit to a gift of there choice that will give on drop down menu a form The idea is this, i want costumer to join VIP membership on my store, i will have a button on my home page the indicate "JOIN VIP MEMBERSHIP" There will be two or more Class of VIP MEMBERSHIP and the will have to pay a signup fee when they are registering. Let assume $2 and $3 only receptively. it can also have this option on check out page, Register, Guest and VIP Membership. i want to be able to set different price of the VIP MEMBERS that will different from other customer. VIP member will have 10% discount on each purchase. I refer to this Discount as Credit. VIP should have ability to check there accumulated discount which they can use to exchange for a gift on their choice , which will be available on there account, like Food Ticket, Movie Ticket.