HSBC — credit card bill statement

Address: Chennai, Tamil Nadu, 600042

Hello team,

Hsbc credit card statement finance charge discrepancy cc # 48xx xxxx xxxx 41xx

Hsbc bank are charging the interest in advance what i need to pay on sep6th 2018 along with last month outstanding.
After statement generation, 22 july i have purchased rs 76, 500.00 and this should be paid on before 06 sep 2018, however statement has mentioned need to pay the interest charge for rs 76500.00 as well. This is not correct still i have time to pay this amount, why have included the interest charge this amount before the payment period time?

This amount should be revised

All most past 15 years am using credit card with other banks i never have this kind of interest.

Regards
Rajagopal