sbi se bt mat lena bhaio

MERE paas sbi bank ka credit card hai card no-4317575038592029 maine 2007 novembarko B.T LE thai maine us par mai shopping ki thi jiski payment maine kar di thi par une us par interst laga diya une kaha ki sir aap ne bt main jo shopping ki hai hum ne us par interst lagaya hai aur mujhe bataya nahi tha ki bt me aap shopping nahi kar sakte maine us par comp bhai ki thai par jawab nahi aaya. ab unhono us per late payment or us per intreset laga laga kar mera bill 7278rs bana diya hai jis se mai bahut pareshan hu plz help me maine unko july mai complaint bhi kari thi ki maine chq daal diya hai to unhone coustmer care walo ne kaha ki agar koi lete fees lagti hai to ham reverse kar denge or jab se latepayment lag kar aaj unhone itna bill betha diya hai sir mai bahut pareshan hu plz meri help karo mera koi out standing hi nahi banta kyonki maine sari payment kar di hai or unhone late payment ke upper late payment jod jod kar OR INTREST US PER JOD JOD KAR unhone 6277 ka bill bana diya hai or ab to jab bhi phone karo who kuch jawab nahi dete hai or mere paas rojana dhamki wale phone aate hai or bahut gandi gandi galiya dete hai plz help me sir