Install Revo Uninstaller (free version) and fully remove Hola, my experience with Hola on the iPhone was not that good, From free ones I would use Tunnel Bear or Proton VPN known for extra security. Experts didnt rate that good due to some security concerns, now they may fix the problems, but dont take the chances where you are, you have other options.
Personally for number of years I been using NordVPN due to extra layers of privacy. But it is a Paid service. Free ones may not give you a faster speeds, yes there is always a catch with freebees.
ps Hopefully Tunnel Bear or Proton VPN can beat Vlads Russian Bear restrictions and help you bee free on Internet.
Another very good is SoftEther VPN, you need to download a "client" the install
SoftEther Download Center
select Client from component options.
After installation you will have many server options in many countries to connect, FREE for life
Good Luck