IF you want to change the business listing plan, one is Plan A ($10) and the other is Plan B ($30). If you wants to change and upgrade the plan from $10 to $30 to avail more features, you must follow these instructions:
STEP 1: Go to Dashboard > Listings, and select Change Plan
Once clicks on the change plan, it will show the details of the currently active plan.
STEP 2: To change the plan click Proceed Here
When upgrading any plan, the you have to pay the full amount.
If you have bought the Plan A for $10 and wants to upgrade to Plan B for $30, you will be charged $30, and this will be processed as a separate transaction. The previously charged $10 (before changing the plan) will not be adjusted automatically, so you will have to pay the full amount of $30.