Don't use SAY and TELL only!! This will limit your IELTS score for lexical resource.
"Said is dead!" Have you heard this expression - it is an easy way to remind you that the words 'say', 'said', 'says' are not high level enough to get a good vocabulary score.
You need more accurate words to express what other people's opinions are:-
Please note on this sheet -
I'm here to help!