Step 1:
Log in to your Yozax Ad Account
Step 2:
Click the Upgrade button
Step 3:
Pick your Plan and click Subscribe.
This is the area you can compare Plan Features and Pricing. Don't forget to check the monthly/yearly costs!
Step 4:
Now you can Checkout. Make sure you fill your details correctly.
You should also check that you have selected the monthly or yearly payment correctly.