Some web hosting service providers might have blocked Arvan’s IP ranges in their firewall. By using this page, you can send Arvan’s IPs to your providers so they could put them in the white list.
You can use this link for automation.
https://www.arvancloud.com/en/ips.txt

Pay-As-You-Go pricing

Go to the Pricing page to see pricing in detail. You can use the Calculator to estimate your expenses.