- This is a user to user forum, you are not addressing Apple directly here.
- If its been less than 14 days since you bought it you can return it for a full refund.
- You can use the money towards the purchase of the Pro Max, and add the difference. Yes Apple offers monthly payments.
You can apply for an Apple Card or for Special Financing with your carrier for the monthly installments,.
link->Financing and Credit - Apple
Pay for the products you love monthly and interest-free when you choose Apple Card Monthly Installments.¹ You’ll get 3% Daily Cash back every time. And if you’re buying a new iPhone, you can also pay monthly with your carrier and take advantage of special offers.