[Resolved]  HDFC Bank — defamation

I got the HDFC Credit card from HDFC bank. there is mention 15000/- credit limit in welcome kit.then after i used 12300/- after 15 to 20 days i swipe the card for 2000/- but it was not accesible.i called the customer care. the told me that your credit limit has been decrease. and they told decrease my credit limit without intimation without sms and without call. so i was insulted by shop owner. infromt of many people so i am launching the complaint against HDFC bank ANDHERI branch .please help me.

Shop name= Mango Shoping Mall
Airoli Sector- 8 navi Mumbai- 400708