Tomato clowns do associate with bulbtippeds in the wild so you have the right anenome. That's is a good start and is also about all you can do to influence your clowns to take to it. The condylactis and the condy are not clownfish hosts and will even eat small 1" clowns on occasion.
Do you have the right lighting for the anenome? The bulbtipped are relatively low light but still need at least four no bulbs over the tank to do well. A combonation of 2 blue and 2 10k bulbs would work well. You should also dose your tank with calcium, iodine, and trace elements for the anenome. While none of this will help get the clowns in the anenome it will give the anenome a suitable place to live. The clowns are easy the anenome for them is hard. And just in case you are thinking this the condy and condylactis anenome will do fine without this type of treatment, but do better with it. If you are unwilling to do this return the anenome to your lfs, as it will probably die without it
. Hope you the best of luck!