Contribution ESA stress

Hi All
Seeking advice with ESA  as finding it so hard to get resolved with problem I am experiencing.
Back in Nov 2016 I was made ill health retired after 31yrs with NHS. I put a claim in for ESA contribution and was awarded, in Nov 16, In July 17 I went for assessment I got zero points, so mandatory appeal, still ) points so appeal, My ESA money was resumed again, but after 365 in Nov 17 was finished. My  court Appeal was June 18, I lost appeal, had no more fight left as i had a accident from fall 4 days before court, and was in a plaster cast broken hand, cut to my face and severe sprain to my ankle. No sympathy, as looking at a year ago I was reduced to emotional wreck so judge stopped, but still lost. Iv made new claim  in June 18 due to my accident as from fracture I have been diagnosed CRPS and have limited use now of my hand, as well as lots of other ailments. I was awarded it after my assessment in Sept 18. To then only receive 1 day payment only. I have been told on my screen a note is left saying "shortfall of NI cont so no more payment can be awarded. But the ESA phone adviser, 3 in total Iv spoken to, have all said they have attached my new claim to old until just after my Court appeal, which should not have happened, it should have been closed Nov 17, if that is the case, was I submitting sick notes. My answer Yes, never stopped, well in that case you should have been credited with just your NI no money, from when my ESA ceased in Nov 17, so Nov17-June18, and I would then have sufficient to pay my new claim. 
Why is claiming benefits so complicated, I feel quite let down, no knowledge as worked all my life, now to be knocked back is just so stressful and irritating!!!!