Congratulations on having your ESA claim reconsidered prior to an appeal.
The DWP should have informed you how your ESA payments were worked out, together with details into which group (WRAG or support group) you have been placed by letter, as it is a legal requirement. This is important should a claimant wish to appeal the revised decision.
You may wish to contact the DWP office which deals with your ESA claim to ask for a formal decision letter?
Nothing on this board constitutes legal advice - always consult a professional about specific problems