Hi ap and welcome to the forum. On the assumption that you are also new to the site, this link should help you find your way around.
Welcome to Benefits and Work I don't know whether you are aware that your name is visible on the forum? If you wish to change your username, in order to maintain a degree of anonymity, you can do so easily by following the advice in this FAQ.
My full name is showing, how can I stop it?
If DWP placed you in the WRAG then you are still there, no matter how the Work Program Provider decided to treat you. That means that your ESA could be sanctioned if you do not attend a meeting when required to do so.
ESA Sanctions You should contact whoever sent the letter and ask what the meeting would be about, whether it is mandatory and what would happen if you did not attend. Then you can make an informed decision about what to do. If you are obliged to attend, whoever organises it should make any 'reasonable adjustment' required due to your condition.