I tried using simple CreateRecurringProfile and UpdateRecurringPaymentsProfile of Paypal NVP apis.
I have confusion If i can achieve my goal or not Please suggest me the solutions
Case 1:
Silver Package = $20 Gold Package = $100
My Custome created Recurring Payment with Billing Cycle of $20 Per month for 6 months on Jan 1st For silver Subscription Plan.
Later on Customer come back on Feb 2nd and updates his subscription package from silver to gold subscription at that time i want to update to subscription plan as All next billing cycle will charge to $100 from $20 but when he upgrades he/she must be charges $80 (i.e sur plus amount) because remaining $20 is paid on Feb 1st's Bill.
Thanks in Advance
Please suggest me some solutions.