Hi and welcome to the POTV forum.
The 0.2ohm coils will work in all the isub range of tanks, but you will find them a denser vape and require max airflow to get the best out of them. I usually run them at between 30 -40 watts (after initial break in). and enjoy them very much.
Obviously make sure you prime them properly and let them sit for a good ten minutes in the tank with juice and start out lowish (18-20watts) and work up gradually until you get the vape that suits you,. of course if you don't want them and want the 0.5ohm, then i would contact the vendor to change them for what you ordered.
Hope that helps and i hope you enjoy it here. All the best.