JSA Stopped

My Triage advisor made an error and sent out my appointment letter late. I received a letter with 5 Triage appointments, however due to it been late 1 had already passed, so when I attended the 2nd - around 2 days after the letter was received I explained why I did not attend, they said it was no problem.

Then I received a letter from DWP asking me to provide reason why I did not attend, so I wrote the reason and it also asked me what I did to notify. I mentioned I could not notify as appointment had passed, but spoke to advisor and no further action was taken.

Then I received a letter stating my JSA was stopping from 1st May-28th May, this was around last week.

So I contacted Triage, they said they did not know why as they had noted down the letter was late, I then had to go to my local JC where they filled out exact same form I did, I told them this but they said this letter was going to a different place and I would hear within 5 working days.

6 working days later, no letter and my JSA did not go into my bank today, so again I went to Triage who said they do not know why this is happening, and again I returned to my local JC, filled out this form for a 3rd time ! and again told to wait.

The thing that bothers me is, I do not mind, as people make mistakes, however when I asked the guy in the JC and said this will get back dated won't it ? (I assumed not my fault of course it would). He pulled a face and said "ooo I don't think we can back date the first 2 weeks).

How on earth can I lose £100+ due to their mistakes ?
Will they back date it ? This is not on, I have done everything they have asked me in my Agreement and more.

It's costing me time and money and also they have given me hardship forms to fill out, should I fill these out ? it's like no one is listening.

Any input is very much appreciated !