Deutsche Bank — Provided false information and asked me to pay a fine

Dear Sir / Madam,

I made a transaction for an amount of rs: 300+. As per the company policy there is no Interest for 45 days.
But when i received transaction details they charged me with an amount of rs 600+ as a fine. Where as the actuall transaction duration was not even 30 days.I paid the amount and When i contacted the customer care they agreed to reverse fine amount to me. But later they again came back and said its not possible.
I don't know why did they agreed during my first conversation and later they disagree.(i felt its not trust worthy to believe Deutsche Bank). I'm planning to Cancel my credit card. Please let me know is there is a way i can get my money back.

Thanks,
Sunil
+91-[protected]


For the credit card transaction "Deutsche Bank"