ESA/Pension query please

I claim contributions based ESA and I'm on an occupational pension.
Every year my ex employer sends me a letter to tell me what that year's pension is.
Every year the DWP send me a form and I have to send the letter and fill out the form.
This year they haven't.
They have normally done it by now.
They said I did not notify them last year of my pension and they deduced several pounds off my ESA
Getting through to them on the phone is a nightmare especially for an autistic person and once I got through to a call handler who said someone would get back to me and they never.
I'm no good at navigating when you have to speak to a robot, I get through to the wrong part.
I just want them to have this years copy of my pension letter from my ex employer.
Could I go to the job centre.
I don't want them thinking I am failing to let them know my latest pension, and I don't want my benefits stopping.
Thanks

Hi Fortunate

No letter to me either, normally I get one that arrives too early, before I know the changes so I end up having to calculate dates and amounts myself. This year nothing and two attempts with the phone nightmare going dead, is enough trying.

Maybe they have realised they were sending the letters, with a 2 week deadline, too early and we will get them asap. You never know... Pigs fly sometimes