Love Holidays accepted money from a third party for an activity that the third party was conducting illegally
Love Holidays are only liable if the coach company obtained the OP's money through criminal activity and Love Holidays knew, or should have known, that this was the case. Taking commission for processing a booking with a coach company does not get remotely near.
A lawyer will take a significant proportion of any compensation
If this is a small claim the OP should represent herself as she will be unable to reclaim legal costs. However, if it is not a small claim she will be able to reclaim her reasonable legal costs from the other side if she wins.
A solicitor is unlikely to give advice that conflicts with his/her own interests
If there is a conflict of interest a solicitor is required to declare it and stand down from the case. And do please explain how advising the OP to launch action against Love Holidays, thereby attracting more fees, would be against the solicitor's interests.
Agree with others that your solicitor is best placed to advise but, on the information posted here, I don't think Love Holidays are liable. If they provided a package holiday they would be liable but they are clear that they are only acting as booking agents. They are therefore not liable for anything their suppliers do or fail to do. You may, of course, be able to get a goodwill gesture from them.