“I got an award for my excellent performance.”
If not, then what should I say in such a situation?
Please correct the above two sentences.
Both sentences are correct.
Dozy,
Can I say as below correcting ‘then’ by ‘than’?:
I got an award for my excellent performance."
If not, than what should I say in such a situation?
No. English learners sometimes confuse “then” and “than” because they look and sound similar, but they are completely different words with completely different meanings, and there is no situation in which one can be replaced by the other. In your sentence you need “then”.