Inefficiency and poor banking procudures

I went to CIMB ss15 branch to get my number updated and the information counter staff told me must do it at ATM machine and never bother to tell me that for credit card will need to fill in form and submit over the counter. Wasted my day off! while making a payment i noticed my credit card TAC been sent to my old mobile number, i called the help desk was advised to send email to Customer Resolution Unit with change of mobile number form. I sent my mail on 12 Sep, 12:50,till now no action