Appeal the decision if you believe you are entitled to receive it, they are probably just hoping that you won't challenge the decision and claim what is rightfully yours.
From what I've read a ridiculous amount of DWP decisions get overturned on appeal because they're just outright wrong but they have made it as difficult/inconvenient as possible to do so in the hope that people just won't bother. They don't call them the nasty party for nothing.
So much truth in this. Re appeal.
A friend gave up work due to illness. Went for ESA due to the illness. Got awarded 0 points so no help. They appealed still 0. The appeal was some one else reading the medical report and coming to the same conclusion as the first guy who did the ESA assesment. The first medical report was factually incorrect to what my friend told them and provided evidence of.
They then went to full tribunal, and was awarded +15 points.
At the tribunal the system was branded not fit for purpose, the provider claimed it was a isolated case and they had retrained staff and change procedures. So no more action was taken. My friend is now getting the help and support they need.
No matter what training and what went on there was no way they should have awarded 0 point. It is purely to weed out those who cannot be bothered to appeal.
Back to the OP. Choose to give up work, long wait.