Student Finance cancelled Tuition & Maintenance Loan.

I applied to Uni back in March '23, as after yrs of working & looking after my children decided to do something for me. Everything was fine, other than short courses, work in house training and college this was my dream to get a Degree. Being a older student it's been a worrying time but supported by family and children decided its the right time. Got accepted on a few courses, picked one I wanted, so already had student finance ready, updated the course as changed it from original one I applied for finance for.
Then yesterday receives a email stating I'm no longer accepted for tuition or Maintenance loan due to already having a degree with apparently honours.
I do not have a degree, the time that I apparently got this degree I was working full time and caring for my children. So I asked where and when I got this degree, student finance can not tell me as I financed this myself. Which I assured them I most certainly did not, I hardly had a penny to my name to survive with 5 children never mind fully fund a 3 Yr degree. So how can I prove, other than send all my qualifications in (which I've done) that I do not hold a degree? If I do not know what this degree is apparently in and they do not, or from where I can not chase it up and find out. I'm lost and heartbroken at the minute..