[Support] which sentence is more correct?

[jctgf]

Did your assistant tell you that I wasn't going/coming to your class today?

Did your assistant tell you that I couldn't go/come to your class today?

Has your assistant told you that I wasn't going/coming to your class today?

Has your assistant told you that I couldn't go/come to your class today?


Hi,
I am unable to go to my English class. Then I leave a message with the teacher’s assistant. A few hours later I run across the teacher on the street and I want to ask her if she'd got my message.
Which sentence above is the best one, please?
Thanks.

[Tdol]

2, though 1 is fine too

[tedtmc]

2 sounds more polite than 1.

not a teacher

[kata1207]

1/2 but 2 seems better because the word 'couldn't' is included