Trusted Dedicated IP VPN service provider

Hi,

Both the Astrill VPN, Pure VPN, Ham VPN, and Open VPN are VPN service that provided by the companies. They are just a service, VPN quality relates to your network.

Technically, VPNs can be classified into many types. Kindly refer to: The VPN classification - Huawei Enterprise Support Community

Most VPN providers use SSL VPN. Of course, other VPN technologies, such as ipsec, may be embedded to make the VPNs more secure.
You can check with the different providers about the technology they use to determine their speed and security.

VPNs are always an open topic, I think you can find the best ones on some pages on the net, check some reviews (I always prefer choosing products with more reviews, it's easier to find a good service which was already used by other people) I personally use Veepn and I find it a reliable service, I would recommend it. Good luck with that!

OP, I also had issues but somewhat different than yours. What my research says is NordVPN provides the best service when it comes to dedicated IP. They have recently moved from traditional servers and have launched colocated servers. I would advise to rethink upon your options and read upon some resources before making a decision.
https://www.topvpnservice.com/blog/dedicated-ip-vpn/