ESA !

Hi there - it's very frustrating when this kind of stuff happens. I have a few suggestions. Firstly, try ringing the DWP number back, explain what has happened and ask to speak to a supervisor, explaining that your claim must exist, as you have been receiving ESA, and that you need to establish the status of your claim as you wish to challenge your ESA being stopped. You may well need some help from a local advice agency to try and sort this out, so you could call the Scope helpline on 0808 800 3333, and they may be able to help you find a local advice agency such as Citizens Advice who can support you through trying to get your ESA back. As soon as you have some paperwork which shows how many points you received from the ESA assessment, then you will have a better idea of how to proceed. There is excellent information on various websites about the ESA activities and descriptors, including a site called www.benefitsandwork.co.uk. This is partly a subscription website, but there is also a lot of detail on it about challenging ESA refusals. The key to getting your ESA back, once you have received a formal decision, is to target where you think you should score points, and to back this up if possible with medical evidence. 
I hope this helps, and good luck.
Jayne