State Bank Of India [SBI] — about reducing the credit limit after charging the annual fees

Address:

Hyderabad, Andhra Pradesh, 500039

I received sbi elite card after all requisite verification about my salary and antecedents. Iwas promptly been charged annual fee of 5000 rs. I have been paying all dues before time and there is nothing outstanding but suddenly i receive a message stating that i was mistakenly given rs 500000 credit limit which was reduced to 100000 with immediate effect without consulting me. This is high handed ness which is not acceptable at any cost and amounts to breach of trust. I kindly request to take stern actions in this regard.