Request for a credit limit increase denied

I requested for a limit increase on my card for the first time since I have the card. I sent in the documentation as per the requirements on the website. But due to an increase in my salary in December the request was denied, then a letter of proof from my employer regarding the increase was requested. And then they also requested from me to resend my October bank statement because it apparently doesn't reflect my October salary. And my December payslip and bank statement reflect my increase and then Keenan said that the bank needs to know where the extra money comes from. I don't care about the rules. But I don't believe that I should be this honest about my finances in this day and age. I feel so ill-treated by a service I have been supporting for over 5 years and have been paying more than my min. monthly payment due. The humiliation I have experienced from Discoverycard. Since I app****. I vow to pay the balance to close this card permanently. I am disgusted in how you treat your clients and by not even taking their credit record into consideration. I have also repeatedly requested for mManagement to contact me in order to resolve these issues.