First claim, £0 awarded, very confused and about to drop to SMP

I did an eligibility checker when my son was born in October because I learned about child benefit and h figured I’d check UC too because my maternity pay is lower than my normal full income and it said I would be eligible for a small amount, awesome. I entered both mine and my partners info, did the exact same amounts on the official claim and jumped through all their hoops and went to meetings only to get my first statement back at £0 due to our earnings.

I’ve checked the statement and although it says the correct weekly amounts (after tax) for us both the monthly take home pay shows as the before tax amount for both of us so it’s substantially higher than it should be (it explicitly says the take home pay should be after tax) which has to be impacting our eligibility.

I was due back at work at the end of march and we had family based childcare lined up but due to some substantial medical issues on their behalf that is completely off the table and I’m going to have to extend my maternity but drop down onto SMP.

I tried asking on my journal for help checking and changing my income but they just told me to read the statement again and fobbed me off. Over never dealt with this system before and it’s so confusing.

Now I’m terrified that we’re not eligible at all or that I won’t know until I’m actually on SMP if I’m eligible for anything and we have zero savings or ability to cover a month of bills without my normal income. What do I do? Please any help or advice is much appreciated.