Please correct the sentences ...

Dear Teacher,

Please correct the following sentences if they are wrong:

1) Thank you very much for your enquiry of today morning.
(can we write like the above if we are sending letter at 12:30 pm)

What is the difference between these sentences and which one is correct?

1a) I did not get my vacation salary yet.

1b) I have not yet got my vacation salary.

2a) Ankit had kept his clock on his study table.

2b) Ankit kept his clock on his study table.

Regards,

Sweetie

1 this morning
1a/b The first is mkore common in British English and the second in American, so both are correct, though the second sounds wrong to many British speakers.
2a/b Without more context, the first doesn't work, because the past perfect is related to another past action or time.