Predicted Grades problem as a private candidate

Hey so I am retaking my maths A level and need a predicted grade for that subject. I was using a tutor on MyTutor to give me a predicted grade but then someone has just informed me that their company policy does not allow this, so I am back at square 1 and quite stressed. The issue is I am intending to apply through my old college, and their internal deadline is on the 28th of November. I'm so annoyed since MyTutor had weeks to tell me they couldn't, it was only after i rang them up asking where my grade is. Anyway I am a bit unsure how to proceed, I will call my college and speak with them, but in the meantime whats the best way to get a predicted grade, do I find another tutor?
If anyone has received predicted grades from tutors previously, perhaps on a different tutoring platform, I would greatly appreciate some info.
Thanks