Time for a change? To switch to a different Payment Plan, here are two steps to follow:
Step 1: You have two options here. You can continue using your current subscription until the end of the period you've already paid for and then cancel it, before switching to a new plan. Alternatively, you can cancel the subscription immediately and request a refund from App Store or Google Play.
Step 2: Choose a new Payment Plan for your Pro version with your preferred payment method.