Citibank - Citicards Changed my balance transfered rate which was for the life of the balance Sioux Falls, South Dakota

In early 2006, I have received a purchase and/or a balance transfer promotion rate of 2.99 for the life of the balance.  I have taken and advantage used $9000.  In December 12, 2007, I received a notice letter that says my promotion will expire October 1, 2007.  I immediately contacted Citibank about the matter and asked the customer service why my balance transfer rate has changed.  No explanation was given except they told me to provide a proof of the promotion.  The rep also indicated that they found the promotion in their system but there is no documentation that I have it therefore I need to fax a proof of the promotion letter.   I acknowledged that I don't have the promotion letter; I have shredded it  my transaction completed.  Big mistake in my part; I should keep it.  Anyway, the Rep told me that she will give me a better rate of 1.99% for 2 years and should contact us if still the balance was not paid off and we will extend it for you.  This time I requested a letter from the Rep and I received it within 5 business days.  Today which is December 23 of 2009; I contacted Citibank customer service which forwards calls in Asia and requested an extension.  Mr. Joe, in Asia told me that I cannot get an extension however suggested another offer which lasts 6 months in the rate of 13.9%. Unbelievable, my credit worthiness is an excellent 760.  I immediately  requested to speak supervisor.  Jason the supervisor told me the same thing and when I asked why the promotion rate is higher than my APR.  The supervisor said " your APR rate will change to 17% your should received a notice letter.  Why? The consumer default rate is high therefore, we change our rates for all our customers.  Can you believe this?  This is outrages; my APR is changing because of consumer default rate.  This is wrong and the US Government should have done something about it; they are stealing millions from us, Americans.  After 14 years of a loyal customer,  I'm planning to close my accounts with Citibank and transfer the remaining balance of $3600 to my capital one card.  I will never do a business with CitiBank Again.