Am I being underpaid Universal Credit

Dear Benefits and Work

I would like to thank you for all the hard work that you do, helping people. I feel I am being underpaid UC I transitioned over from ESA last year in May. Below I am going to paste an email which has been sent to UC and CAB yesterday, I was hoping you could also help me out, please read email below:

Dear CAB

Please could you help with my universal credit? I think I'm being underpaid.

I was getting ESA and the SDP and I am in the support group.

ESA £856.26 per month (395.20 every 2 weeks)

My two children came to live with me in May 2021 and I had to transition over to universal credit as it was the only way to claim benefits for my children. I was told that when I move over that I would not lose out on any money and I would get a transitional payment to make it the same amount that I was getting on ESA £856.26 per month. This was all fine. I transitioned over and worked it all out and I was about £4 worse off each month which I wasn't bothered about, when I swapped over to UC everyone was receiving a £20 a week uplift payment which works out to £86 a month.

so this what they were paying me per month:

Standard allowance £324.84
LCWRA £343.63
Transitional payment £97.84
£20 week uplift £86
Total £852.31 which was basically what I was getting when I was on ESA £856.26 like i said above.

This £20 a week uplift has now stopped and has been for a while, £852.31 - £86 = £766.31 is now what I'm getting for myself per month. So I moved over to universal credit and I am now worse off, I was getting £856.26 per month on ESA, I'm now getting £766.31 on UC which means I'm being paid £89.95 short each month.

To make things worse my rent went up in April not by a lot about £15 pound a month, instead of increasing my housing benefit they took this increase from my transitional payment. Also for some reason I now have to pay council tax also, I paid £64 today and I have to pay £42 every other month, I have never missed a payment and I don't know what is going on I phoned them and they didn't explain anything

I'm also claiming PIP as I have various disabilities, please could someone help me out with all this please