UCAS resit predicted grades

I’m really struggling to find someone to do my predicted grades for me . My old college will give me a reference but no prediction. I don’t know what to do and I can’t afford to spend lots of money on tuition as I have to pay for my resit exams 😓

I seem to recall someone here on TSR saying that if you're retaking A levels and you don't have predicted grades, then unis will assume they'll each be one grade above what you got originally.

Would predictions at that level work for you? (If so, I'll have a search and try and find the source of the above assertion.)