Barclay Bank Credit Card — They rob the customer

I am fed up with this bank’s poor services. They never send me statement till the first month I got the card. First month they send me the sms alert about my statement & i paid them. Second month they haven’t send me any information about my card. I wrote them about 20 times but in reply every time they write we will contact you in 7 working days. After the due date they keep on adding financial charges on my amount.
I think this is policy of some banks to don’t send any statement to customer & charge interests & other financial charges