State Bank Of India [SBI] — Wrong calculation of PPF interest

Address: 600041

Hi,
My self suneel and i took a ppf account in sbi 19th jan-17 and deposited 10000/-. After financial year end (31-mar-17) they credited the 133 rupees as interest. Then i gave the return complaint on sbi home branch (Omr road, chennai) and they simple replayed 8% of interest for 10, 000 is 133 rupees only.
How they calculated i didn't understand. Can any one help on this issue.

Please find the attachment.

Br,
Suneel