State Bank Of India [SBI] — explain the charges

The charges charged to my card ending - 2651

This is regarding charges on my latest credit card statement,
15/04/2020 fin charge on retail (Excl tax 345.03) debit 1, 916.82
15/04/2020 fin charge on emd (Excl tax 616.61) debit 3, 425.60
Igst db @ 18.00% debit 1, 376.72

Please explain above charges. As per my knowledge i paid entire amount charged on march, 2020 statement. For your information i didn't requested any moratorium on my card.

I tried your contact through your online form but it didn't work.