Prolong the project
Open the section "Funds" => "Refill balance":
Select the period you want to make payment for.
When you pay for a longer period, you get a bonus:
180 days - 10%;
360 days - 20%;
1080 days - 30%.
Check connected products.
Don't forget to enter the upfront payment amount for call forwarding.
Add a promo code if you have one.
Choose the payment options: PayPal or payment by Mastercard/Visa:
5.1. If you selected the cards, enter your card details for payment and follow the instructions on the screen.
5.2. If you selected Paypal — you should log in to your PayPal account and choose the card or account to pay with.
If you don't have an account with Paypal — you can pay by credit card while creating one.
For this, enter your data in the fields shown on the screen.
TopUp your balance without a period
Open the section "Funds" => "Refill balance".
Select "Refill the balance without period".
Enter the required amount and proceed to payment.
The minimum amount is 10 USD.