Central Board Of Secondary Education [CBSE] — Negligence of school and not hearing behaviour

Actually I passed class 10th in 2020 from Lpcps vinamra khand gomti nagar lucknow. When registration for class 10 was going on I had issues related to my name spelling, actually my spelling which I filled in the forms were correct but tc which was issued by my previous school had wrong spelling, I asked them to correct it through affidavit but they said it will be done according to Tc only I asked them to plz provide alternative to the problem they didn't but after that they gave me TC with the correct spelling and marksheet with wrong one now I am studying in other school, so my class 12th marksheet will have correct spelling only, I researched about the correction of marksheet and got to know that my school will be required to mail cbse regarding that but they denied, what should I do now, I can't have both marksheets with different spellings and I am trying to get it resolved since 3 months . Kindly help I have to get registered for CA foundation and last date is very near if I will not be able to sort it out my 1 year will be wasted